Softonic Tools

A1C Calculator

Convert HbA1c to estimated average glucose in mg/dL or mmol/L, or estimate A1C from eAG with ADA formulas and non-diagnostic reference bands.

ACS Citation Generator

Create an ACS-style reference for journal articles, books, chapters, and websites with DOI, URL, pages, and access date fields.

AMA Citation Generator

Create AMA-style references for journal articles, books, websites, and chapters with author initials, DOI, URL, and access-date guidance.

ATS Resume Checker

Compare your resume with a job description, review keyword coverage and standard sections, and get a transparent ATS-readiness checklist.

Band Name Generator

Generate band name ideas by genre, mood, lineup and keyword, then copy a shortlist with practical checks for pronunciation, merch and trademark research.

Beat Maker

Create simple drum beats in a 16-step browser sequencer with tempo, swing, kits, pattern presets and local Web Audio playback.

Book Title Generator

Generate book title ideas for novels, memoirs and nonfiction with genre, tone, keyword and subtitle controls. Draft a shortlist fast.

Bra Size Calculator

Estimate a starting US, UK and EU bra size from snug underbust and full-bust measurements in inches or centimeters, with measuring and fit tips.

Catalytic Converter Replacement Cost Calculator

Estimate catalytic converter replacement cost from parts, labor, diagnostics, fees and tax, with an itemized total and practical planning range.

Word Counter

Count words, characters, sentences and paragraphs with reading time, speaking time, keyword density and a Flesch readability score for essays, posts, captions and meta descriptions.

Emoji Kitchen

Try verified Google Emoji Kitchen sticker pairs, download PNGs, and get supported suggestions when a pair is not in the curated set.

Character Counter

Count characters, words, lines, sentences and paragraphs in any text. See totals with and without spaces plus a character breakdown.

Password Generator

Generate strong random passwords with adjustable length, symbols, numbers and mixed case using cryptographic randomness.

Random Name Generator

Generate plausible English-language names from popular first and family name lists. Choose gender, quantity and format.

Font Changer

Switch plain text into bubble letters, squared letters or full-width characters using pure Unicode. Paste the result anywhere — no images involved.

Username Generator

Generate username ideas from a seed word with optional numbers and separators. Handy for new accounts, gamer tags and alternate profiles.

Fancy Text Generator

Convert plain text into dozens of Unicode fancy font styles — script, bold, bubble, gothic and more — for social bios, captions and usernames.

Business Name Generator

Generate business name ideas from industry keywords and style choices, then use the checklist to verify domains, registries and trademarks.

Lorem Ipsum Generator

Generate clean Lorem Ipsum paragraphs, sentences or words for wireframes, mockups and drafts. Copy in one click.

Anagram Generator

Enter a short word and see every unique rearrangement of its letters, with duplicate permutations removed and a controllable result limit.

Glitch Text Generator

Create Zalgo-style glitch text with Unicode combining marks. Choose intensity, preview variants and copy corrupted text for profiles, memes or horror posts.

Wingdings Translator

Turn Latin letters and digits into Wingdings-style Unicode symbols for puzzles, jokes and retro Windows notes.

Meme Text Generator

Add classic meme captions to a template or your own image. Set top and bottom text, tune font, color and stroke, then download or copy a PNG.

Add Line Numbers

Prefix every line of pasted text with a number. Choose start number, padding width, separator and whether to skip blank lines.

Aesthetic Font Generator

Turn plain text into aesthetic Unicode fonts (vaporwave, cursive, bold, small caps, bubble). Copy-paste into Instagram, TikTok and Discord bios.

Anagram Solver

Paste scrambled letters or a crossword fodder clue and get every valid English word that can be made, sorted by length.

ASCII Art Generator

Turn any short text into big ASCII-art letters. Choose standard, block or shadow styles, then copy the result into a README or terminal banner.

ASCII to Text Converter

Decode a list of ASCII codes — decimal, hex or binary — back into the readable text they represent. Handles separators and prefixes automatically.

Bold Italic Text Generator

Turn regular text into bold italic Unicode characters. Paste-ready for Instagram, Twitter/X, LinkedIn bios and Discord where markdown is not supported.

Book Title Generator

Generate book title ideas for novels, memoirs and nonfiction with genre, tone, keyword and subtitle controls. Draft a shortlist fast.

Braille Translator

Translate text to Unicode Grade 1 Braille and decode Braille back to letters. Handles capitals, digits and punctuation, all in your browser.

Brand Name Generator

Generate brand name ideas from keywords. Includes invented words, portmanteaus and evocative pairings with domain availability hints.

Bubble Text Generator

Turn plain text into bubble letters (Ⓐ Ⓑ Ⓒ) you can copy and paste into Instagram, TikTok and Discord bios. Outlined, filled and lowercase styles, no app needed.

Bullet Point Generator

Paste a paragraph or list of sentences and get clean bullet points. Choose bullet style, indentation and export to Markdown or plain text.

Case Converter

Convert text between UPPER, lower, Title, Sentence, camel, snake, kebab and CONSTANT cases. Handles acronyms and preserves punctuation.

JSON Formatter

Paste JSON to pretty-print with 2 or 4 spaces, minify it to compact output, or run a quick syntax check before copying the result.

Color Palette Generator

Generate monochromatic, analogous, complementary, triadic or tetradic color palettes from a base HEX color and export copy-ready CSS variables.

HEX Color Picker

Pick any colour visually and get its HEX, RGB, HSL, HSV and CMYK values, plus accessibility contrast against white and black.

Random Letter Generator

Generate random A-Z letters. Choose the count, pick uppercase, lowercase or mixed case, and use the result for games, prompts or classroom activities.

Random Color Generator

Generate 1 to 50 random HEX colors with swatches you can preview, copy and use in CSS, design tests or palette exploration.

Random Color Palette Generator

Generate random color palettes from 2 to 15 swatches, choose a vibrant, pastel, muted or dark style, then copy HEX codes or CSS variables.

ASCII to Binary Converter

Convert any ASCII string to its binary representation. Every character becomes eight bits, space-separated, ready to paste into a protocol trace or homework.

ASCII to Hex Converter

Convert ASCII text to hexadecimal byte values. Output uses two hex digits per character, ready for memory dumps, packet traces or firmware tables.

Base64 to Hex Converter

Convert a Base64 string into its underlying bytes expressed as hexadecimal. Useful for inspecting tokens, keys, certificates and JWTs.

BBCode to HTML Converter

Convert BBCode (bulletin-board markup) to clean HTML. Handles formatting tags, lists, quotes, code, images, links and tables.

Binary to ASCII Converter

Paste binary (space-separated bytes or a long bitstream) and get the ASCII text it represents. Handles 7-bit and 8-bit encodings.

Binary to Decimal

Convert binary numbers to decimal instantly. Shows the positional expansion so you can see how each bit contributes.

Binary to Hex Converter

Convert binary input to a plain uppercase hexadecimal value. Non-binary characters are ignored and leading zeros are not preserved.

Binary to Octal Converter

Convert binary to octal by grouping bits three at a time. Useful for Unix permissions, legacy systems and compact numeric display.

Boolean Algebra Simplifier

Simplify Boolean expressions using Karnaugh maps and the Quine-McCluskey algorithm. Shows every minimisation step and a final SOP/POS form.

Word Frequency Counter

Find the most repeated words in any text with counts and density percentages. Useful for editing, SEO checks and content audits.

Backlink Anchor Text Analyzer

Paste backlinks, CSV rows, URL | anchor pairs or plain anchor lines to count repeated anchor text and export Anchor Text,Count,Share CSV.

Breadcrumb Schema Generator

Generate valid BreadcrumbList JSON-LD for any page hierarchy. Produces schema.org markup ready to paste into your site head.

Broken Link Checker

Crawl a single page (or a small sitemap) and flag every broken link by HTTP status. Fast check with redirect chain detection.

Canonical Tag Generator

Generate a valid rel=canonical link tag. Includes HTTP Link header equivalent and common mistakes to avoid.

Canonical URL Checker

Check the canonical URL Google sees for any page. Detects HTML link tag, HTTP Link header, conflicts and redirect chains.

QR Code Generator

Generate QR codes for URLs, plain text, WiFi credentials, vCards and calendar events. Download as PNG or SVG. No registration, no watermark.

Barcode Generator

Create scannable 1D barcodes in Code 128, Code 39, EAN-13, UPC-A, ITF-14 and Codabar. Export as PNG, SVG or PDF for print.

Meme Generator

Make memes from popular templates (Drake, Distracted Boyfriend, Doge) or your own image. Top/bottom text with Impact font, stroke and shadow.

GIF Maker

Turn a sequence of images or a short video into an animated GIF. Set frame rate, loop count and dimensions before exporting.

HEIC to JPG Converter

Convert HEIC photos from iPhone to JPG in your browser. No upload required, bulk-friendly, keeps EXIF metadata.

WebP to PNG

Convert WebP images to PNG while keeping transparency and pixel-perfect quality for editing, printing and legacy design tools.

Photo Editor

Browser-based photo editor with crop, rotate, brightness, contrast, saturation, filters, text overlay and export to JPG, PNG or WebP.

Image Resizer

Resize images to pixel-exact dimensions or percentages while preserving aspect ratio. Batch-friendly, no upload.

WebP to JPG

Convert WebP images to JPG/JPEG in your browser. Choose quality, flatten transparency to a background color and download without uploading your files.

Image Compressor

Compress JPG, PNG and WebP images to reduce file size while preserving visual quality. Entirely in your browser, no upload.

Image Upscaler

Upscale low-resolution images by 2x, 3x or 4x using AI super-resolution or classical interpolation, with preserved detail.

PNG to JPG Converter

Convert PNG to JPG in your browser. Flatten transparency onto any background color, keep dimensions, and shrink many photo-style PNGs by 60-90%.

Compress GIF

Reduce animated GIF size in your browser by scaling dimensions, keeping fewer frames, and tuning encoding quality. Preview the loop before downloading.

SVG to PNG

Convert SVG files or markup to PNG in your browser, choose a scale factor, and keep transparent edges sharp.

QR Code Reader

Decode a QR code from a PNG, JPG or WebP image in your browser. View URL, Wi-Fi, vCard, SMS, email, calendar, geo or plain-text payloads before you act.

Bulk Image Resizer

Drag in multiple images, fit or stretch them to a target size, and export JPG, PNG or WebP files in one ZIP. Processing stays in your browser.

Social Media Image Resizer

Resize one image into built-in social media presets for Instagram, Facebook, X, LinkedIn, YouTube, Pinterest and TikTok. Preview each PNG and download the sizes you need.

JPG to PNG Converter

Convert JPG to PNG to preserve exact pixel values, support transparency and avoid further lossy re-compression in edits.

PNG to SVG Vectorizer

Trace PNG raster images into SVG paths in the browser. Best for logos, icons and line art. Control threshold, colour count and smoothing.

BMP to PNG

Convert BMP files to PNG in the browser. Lossless, preserves colour depth and adds optional transparency from the original BMP alpha channel.

PDF to Word Converter

Convert PDFs to fully editable Word documents. Preserves headings, lists, images and tables. Scanned PDFs go through OCR automatically.

JPG to PDF Converter

Combine JPG images into a single PDF document with page size, orientation and margin controls for contracts, receipts and portfolios.

PDF Merge

Merge multiple PDFs into a single document with drag-and-drop page ordering and instant download.

Edit PDF

Add text labels, highlights, rectangle outlines and whiteout boxes to a PDF in your browser. Export a new PDF without installing software.

Compress PDF

Compress PDF files in your browser by re-rendering pages as smaller JPEG-based PDFs for easier sharing and uploading.

PNG to PDF Converter

Combine PNG screenshots, scans, or design exports into one PDF. Choose A4 or Letter pages, orientation, and margins before downloading.

Split PDF

Split a PDF into one file per page or custom page ranges like 1-3, 4-6, 8. Process the file in your browser and download a ZIP.

Remove Pages from PDF

Delete selected pages or page ranges from a PDF. Enter numbers such as 2, 5-7, keep at least one page, and download a trimmed PDF.

PDF to Excel Converter

Extract selectable text from PDF tables into XLSX or CSV in your browser. Best for clean digital PDFs; scanned files need OCR first.

Word to PDF

Convert Word .doc and .docx documents to PDF with page layout, images, tables and headings preserved. Secure upload, automatic deletion after 2 hours.

PDF to JPG Converter

Rasterize PDF pages to JPG at the DPI and quality you need. Download page-by-page or as a ZIP. Great for thumbnails and previews.

Merge PDF and Images

Combine PDFs plus JPG and PNG images into one PDF, reorder the uploaded files, and download the merged document from your browser.

PDF to PNG Converter

Render PDF pages as PNG files with sharp text, transparency support and your chosen DPI. Perfect for documentation and thumbnails.

Excel to PDF Converter

Convert XLSX, XLS or CSV files into a landscape A4 PDF in your browser. Each worksheet becomes a clean table page ready to download.

Add Blank Pages to PDF

Add 1 to 50 blank pages to an existing PDF. Choose A4, Letter, Legal, A3, or A5, portrait or landscape, and insert them at the beginning, end, or before or after a page number.

BMI Calculator

Calculate body mass index from height and weight. Shows WHO category, healthy-weight range and limitations of BMI.

Calorie Calculator

Estimate daily calorie needs for your goal using Mifflin-St Jeor BMR and activity factors. Includes deficit and surplus targets.

GPA Calculator

Calculate grade point average from letter grades and credit hours. Supports US 4.0 and 5.0 honors scales with the standard A/B/C/D letter table.

Paycheck Calculator

Estimate your 2026 take-home pay after federal, state, FICA and benefit deductions from gross salary for any US state.

Age Calculator

Calculate exact age in years, months and days from a birth date, plus total days, hours and the next birthday countdown.

Concrete Calculator

Calculate how much concrete you need for slabs, footings, columns and walls. Get cubic yards, bag counts and material cost estimates.

Inflation Calculator

Calculate the equivalent purchasing power of a dollar across any two years using historical CPI data from 1913 to today.

Scientific Calculator

Full scientific calculator with trig, log, exponents, factorial, memory, parentheses and DEG/RAD toggle. Runs in your browser.

TDEE Calculator

Estimate your Total Daily Energy Expenditure from BMR and activity level to plan calories for any goal.

Tip Calculator

Work out the tip amount and total bill from any subtotal and tip percentage with optional tax handling.

Fraction Calculator

Compute sums, differences, products and quotients of fractions, including mixed numbers. Results shown in lowest terms with each step.

World Clock

See the current time in multiple cities side by side with daylight-saving adjustments. Useful for distributed teams and travel.

Blood Alcohol Content Calculator

Estimate BAC using the Widmark formula based on drinks, body weight, sex and time since first drink. Educational only, not legal advice.

Ovulation Calculator

Estimate your ovulation date and fertile window based on the first day of your last period and average cycle length.

BMR Calculator

Estimate your basal metabolic rate — the calories you burn at complete rest. Uses the Mifflin-St Jeor equation, the current clinical standard.

CD Calculator

Calculate the interest and final balance on a Certificate of Deposit. Handles compounding frequency and early withdrawal penalties.

Time Zone Converter

Convert a time between any two time zones, with daylight-saving shifts applied automatically.

EUR to USD Converter

Convert Euros to US Dollars with your chosen EUR/USD rate. Enter the current rate manually, compare scenarios and copy the result.

Percentage Change Calculator

Measure how much a number went up or down in percent. Handles growth, decline, year-over-year, and signed change with the exact formula shown.

Roth IRA Calculator

Estimate Roth IRA growth from annual contributions, expected return and years to retirement. Shows contributions vs growth, with after-tax equivalence.

Time Duration Calculator

Calculate the duration between two times in HH:MM, decimal hours, minutes and seconds.

Work Hours Calculator

Calculate total work hours from start and end times with breaks and overtime, perfect for timesheets and contractor invoices.

Integral Calculator

Approximate definite integrals for built-in functions such as e^x, sin(x), x², x³, √x, 1/x and ln(x) using composite Simpson's rule.

Macro Calculator

Turn a daily calorie target and macro percentages into grams of protein, carbs and fat. Check balanced, high-protein, muscle-gain and lower-carb splits.

Sales Tax Calculator

Calculate tax on a tax-exclusive amount, or extract the tax included in a gross price. Works with sales tax, VAT, GST and custom rates.

Celsius to Fahrenheit Converter

Convert Celsius to Fahrenheit with the standard formula, quick weather references, oven settings, body-temperature context and Kelvin.

One Rep Max Calculator

Estimate your one-rep max (1RM) from weight lifted and reps completed using Epley, Brzycki and Lander formulas.

Polynomial Derivative Calculator

Differentiate polynomial expressions such as 3x^3 + 2x^2 - 5x + 7 and see how constants, coefficients and powers become f'(x).

Standard Deviation Calculator

Compute mean, variance, and standard deviation (sample n-1 or population n) for any dataset. Shows coefficient of variation and z-scores.

Dog Age Calculator

Convert your dog's age to human years using modern veterinary research. Breed-size aware: small, medium, large and giant dogs age differently.

GBP to USD Converter

Convert British pounds to US dollars at the current exchange rate. See the mid-market rate, plus how banks and card networks apply their margin.

HELOC Calculator

Estimate how much HELOC room may remain after your mortgage balance using home value and a lender CLTV limit.

KM to Miles Converter

Convert kilometres to statute miles with the exact 0.621371 factor. Useful for running splits, road-trip planning and imported navigation data.

Mulch Calculator

Calculate mulch volume from bed length, width and depth. Get cubic feet, cubic yards, 2 cu ft bag equivalents and bulk versus bag cost.

Paint Calculator

Estimate wall and ceiling paint from room dimensions, coats, coverage rate and price per gallon, with metric conversion guidance for litre-based paint labels.

Percent Calculator

Calculate a percent of a value, add or subtract a percent, or find the original value behind a percentage. Enter two numbers and see every formula.

Period Calculator

Estimate the start and end dates of your next 6 periods from your last period, cycle length and bleeding duration. Educational tool, not medical advice.

Pregnancy Due Date Calculator

Estimate your baby's due date from the first day of your last period or a known conception date. Uses Naegele's rule, cycle-length adjustment and standard obstetric timing.

Savings Calculator

Project the future value of your savings from a starting balance, regular deposits, an annual rate and a chosen term, with monthly, annual or custom compounding.

Take-Home Pay Calculator

Estimate US take-home pay after federal income tax, FICA, state and local taxes, plus common payroll deductions.

Unit Converter

Convert metric, US customary and imperial units across length, weight, volume, time, speed and area. Uses precise base factors in one simple converter.

Yen to USD Converter

Convert Japanese yen (JPY) to US dollars with a manual USD-per-JPY rate. Use the default estimate or paste your current card, bank or FX rate.

Body Fat Percentage Calculator

Estimate body fat percentage from neck, waist, hip and height measurements. Uses the classic US Navy tape formula for trend tracking, not diagnosis.

Home Affordability Calculator

Estimate a realistic home price from income, debts, down payment, rate, term and monthly tax plus insurance costs.

Social Security Calculator

Estimate a US Social Security retirement benefit from your PIA and claiming age. Compare monthly and annual amounts at 62, FRA 67 and 70.

Triangle Calculator

Enter three side lengths to check whether they form a valid triangle, then calculate the type, area, perimeter and all three angles.

Business Days Calculator

Count business days in an inclusive date range. Shows Monday-Friday workdays, Saturday/Sunday weekend days, total calendar days and work-week equivalent.

Closing Cost Calculator

Estimate US home purchase or refinance closing costs from lender fees, title insurance, appraisal, inspection, recording, prepaid taxes, HOA and other line items.

Discount Calculator

Calculate the final price and savings from an original price and a percent-off discount. Useful for sale tags, coupons and quick checkout checks.

eGFR Calculator

Estimate eGFR from serum creatinine, age and sex using the race-free 2021 CKD-EPI creatinine equation. Results in mL/min/1.73 m².

N·m to ft-lb Converter

Convert Newton-meter torque values to ft-lb, lb-ft and in-lb for workshop manuals, wheel nuts, bicycle bolts and mechanical jobs.

Pythagorean Theorem Calculator

Solve any side of a right triangle with a² + b² = c². Enter two sides to get the missing leg or hypotenuse, plus the triangle angles.

Simple Interest Calculator

Compute simple interest with the P × r × t formula. Enter principal, annual rate and time to see interest earned and final balance.

Square Root Calculator

Compute square roots for positive numbers, zero and negatives. Get a decimal approximation, simplified radical form for whole-number inputs and clear notes on perfect squares and complex roots.

Feet to Inches Converter

Convert decimal feet to inches with the exact factor of 12 and a centimeter cross-check for plans, product dimensions, heights and imported measurements.

Fuel Cost Calculator

Estimate fuel cost for a drive from distance, fuel economy and pump price. Use MPG with gallons, km/L with litres, or convert L/100 km before calculating.

Military Time Converter

Convert 2:30 PM to 14:30 or 14:30 to 2:30 PM. Clear 12-hour and 24-hour time conversion for schedules, aviation, healthcare, logs and travel.

Moon Sign Calculator

Estimate which zodiac sign the Moon was in on your birth date and learn what Moon signs mean in a Western natal chart.

Numerology Calculator

Calculate name-based numerology numbers with Pythagorean or Chaldean letter values: expression, soul urge and personality.

Ratio Calculator

Enter any three values in a:b = c:d to find the missing term. Whole-number a:b ratios are also reduced to lowest terms.

Rising Sign Calculator

Estimate your rising sign from birth date and birth time. This quick astrology calculator uses a simple two-hour block method, not a full birth chart.

Running Pace Calculator

Enter distance and finish time to calculate pace per km, pace per mile, average speed and projected 5K, 10K, half marathon and marathon finish times.

Age Difference Calculator

Calculate the exact age gap between two birth dates in years, months and days, with total months, weeks and days.

Tip Split Calculator

Split a restaurant bill by bill amount, tip percentage and group size, with tip, total and per-person amounts shown instantly.

USD to EUR Converter

Convert US dollars to euros with the exchange rate you enter. Handy for travel budgets, online shopping, invoices and quick estimates.

Triple Integral Calculator

Approximate definite triple integrals over numeric x, y and z bounds with the midpoint rule in your browser.

Fahrenheit to Celsius Converter

Convert Fahrenheit temperatures to Celsius with the exact formula, Kelvin output and common reference points for weather, cooking and health.

USD to GBP Converter

Convert US dollars to British pounds at the latest reference rate. Useful for UK shopping, travel, invoices and quick price checks.

HELOC Payment Calculator

Calculate monthly HELOC payments during draw (interest-only) and repayment (amortised) phases from balance, APR and term.

Miles to KM Converter

Convert miles to kilometers with exact factor (1 mi = 1.609344 km). Includes a common-distance reference table and mental-math shortcuts.

Savings Goal Calculator

Work out how much to save each month to reach a target amount by a specific date, with an assumed interest rate.

Cooking Unit Converter

Convert cooking volume units including teaspoons, tablespoons, fluid ounces, cups, pints, quarts, gallons, millilitres and litres.

Height Feet & Inches to CM Converter

Convert a height in feet and inches to centimetres and metres. Useful for medical forms, passports and fitness apps.

Inches to Feet Converter

Convert inches to decimal feet and yards instantly. Useful for construction, DIY, spreadsheet estimates and imperial measurement work.

Name Numerology Calculator

Calculate your destiny number and expression number from your full name using Pythagorean numerology, with a personality reading.

Aspect Ratio Calculator

Enter any width or height and an aspect ratio to get the matching dimension. Supports 16:9, 4:3, 1:1, 21:9, 3:2 and custom ratios.

Cholesterol Ratio Calculator

Enter lipid panel values in mg/dL or mmol/L and review total/HDL, LDL/HDL and triglyceride/HDL ratios with cautious context.

Waist to Hip Ratio Calculator

Calculate waist-to-hip ratio from matching waist and hip measurements, then compare your WHR with sex-specific screening bands. Private and no login required.

10K Pace Calculator

Calculate the pace per kilometer and per mile you need for a 10 km target, with 5K split timing and matching treadmill speeds in km/h and mph.

401k Calculator

Project your 401(k) balance from salary, age, contribution percent, employer match and expected return, with 2026 IRS limits and a year-by-year breakdown.

5K Pace Calculator

Work out the pace per km and per mile needed to finish a 5K in any target time, plus 1K split times you can program into a watch.

A1C Calculator

Convert HbA1c to estimated average glucose in mg/dL or mmol/L, or estimate A1C from eAG with ADA formulas and non-diagnostic reference bands.

ABV Calculator

Enter original gravity (OG) and final gravity (FG) to calculate ABV, ABW, apparent attenuation and calories per 355 ml / 12 fl oz serving.

Acceleration Calculator

Calculate acceleration from initial velocity, final velocity and time using a = (v − u) / t. Shows result in m/s², equivalent g-force, and the change in velocity.

Acres to Hectares Converter

Convert acres to hectares with the exact factor 1 acre = 0.40468564224 ha, plus reverse conversion notes and practical land-size examples.

Acres to Square Feet Converter

Convert acres to square feet and back with the exact factor 1 acre = 43,560 sq ft. Useful for land listings, deeds, surveys and site plans.

Adult Height Predictor Calculator

Estimate a child's mid-parental target adult height from biological parent heights, with centimeters or feet/inches and a typical target range.

Allowance Calculator

Calculate an age-appropriate kids allowance using the "dollar per year" rule and chore-based variants, with annual totals for budgeting.

Amortization Calculator

Build a monthly amortization schedule for a fixed-rate loan, with principal, interest, remaining balance and running totals for every payment.

Amp-Hour Calculator

Work out battery runtime and stored energy from amp-hours, voltage and load current. Get runtime in hours and minutes plus energy in watt-hours and kilowatt-hours.

Angular Velocity Calculator

Calculate angular velocity (rad/s), frequency (Hz) and RPM from linear velocity and radius using ω = v / r. Instant, accurate results for any rotating object.

Anion Gap Calculator

Calculate the serum anion gap from sodium, chloride and bicarbonate in mEq/L. Shows the result with a worked example and reference ranges, for educational use only.

Annuity Calculator

Calculate the present or future value of an annuity, with fixed or variable payments, and compare immediate vs. deferred structures.

ANOVA Calculator

Perform one-way ANOVA on two or more groups to test whether their means differ significantly. Reports F-statistic, p-value and summary.

Antilog Calculator

Compute the antilogarithm (inverse log) for base 10, e, 2 or a custom base. Enter the exponent and instantly get b raised to that power, with the base shown.

APR Calculator

Calculate the real APR on a loan including origination fees, points and closing costs — the comparable number lenders must disclose.

APY Calculator

Convert a nominal interest rate to effective APY given compounding frequency, and find the APY for savings accounts, CDs and high-yield accounts.

Aquarium Size Calculator

Calculate aquarium volume in litres and gallons from tank dimensions, plus filled weight and fish stocking using the 1 inch per gallon rule.

Arc Length Calculator

Calculate the arc length of a circle from radius and central angle, or from chord and radius, with results in degrees and radians.

Area Converter

Convert between every common area unit: m², ft², yd², km², mi², acres, hectares, ares. With precise factors and quick-reference values.

Arithmetic Sequence Calculator

Find the nth term and sum of an arithmetic sequence from the first term, common difference and number of terms. See a sequence preview instantly, free.

ARM Mortgage Calculator

See the monthly payment on an adjustable-rate mortgage during the fixed intro period and after the first reset, with the balance at reset.

Army Body Fat Calculator

Estimate body fat percentage using the US Army tape test (AR 600-9): height, neck and waist for men, plus hip for women.

Arrhenius Equation Calculator

Calculate the reaction rate constant k from the pre-exponential factor A, activation energy Ea (kJ/mol) and temperature T (K) using the Arrhenius equation, instantly in your browser.

Asphalt Calculator

Estimate how much asphalt you need for a driveway, lot or road. Enter length, width and thickness to get tons, square footage, cubic yards and total cost.

ATM to PSI Converter

Convert between atmospheric pressure (atm) and pounds per square inch (psi) with the exact factor 1 atm = 14.6959 psi.

Auto Loan Calculator

Calculate the monthly payment, total interest and total paid on a new or used car loan. Include down payment, trade-in, sales tax and fees.

Baby Percentile Calculator

Check a baby's weight, length and head circumference percentile against WHO growth standards from birth to 24 months.

Baluster Calculator

Enter your rail span, baluster width and code maximum gap to get the exact number of balusters you need and the even spacing between each spindle, with no gap wider than code.

Bar to PSI Converter

Convert pressure between bar and pounds per square inch (psi). 1 bar = 14.5038 psi exactly, with both directions supported.

Battery Life Calculator

Estimate how long a battery will last from its capacity in mAh, the load current in mA and a discharge efficiency factor. Get runtime in hours, days and minutes.

Batting Average Calculator

Calculate a baseball or softball batting average from hits and at-bats. Enter the numbers and get the standard three-decimal AVG (like .300) instantly.

Binomial Probability Calculator

Compute exact, cumulative and tail probabilities for a binomial distribution. Enter n trials, p success rate and k successes.

Biweekly Mortgage Calculator

Compare biweekly mortgage payments vs monthly. See years shaved off the loan and total interest saved with true biweekly amortization.

Board Foot Calculator

Calculate board feet for any lumber from thickness, width and length, multiply by quantity, and add a price per board foot to get the total cost for your order.

Boat Loan Calculator

Estimate monthly payments, total interest and payoff date for a boat loan. Supports fixed rates and term lengths from 5 to 20 years.

Bond Yield Calculator

Calculate current yield and yield to maturity for a bond from its face value, coupon rate, market price and remaining term.

Bowling Score Calculator

Calculate your ten-pin bowling score with full strike and spare bonuses. Enter your rolls using X, / and - and get the exact total plus a frame-by-frame breakdown.

Boyle's Law Calculator

Solve Boyle's law P₁V₁ = P₂V₂ for the final volume V₂ instantly. Enter the initial pressure and volume plus the new pressure, and read the answer right away.

Bra Size Calculator

Estimate a starting US, UK and EU bra size from snug underbust and full-bust measurements in inches or centimeters, with measuring and fit tips.

Bra Size Converter

Convert between UK, US, EU, French/Belgian, Australian/New Zealand and Japanese bra sizes. Band and cup mapping with full sister-size hints.

Break-Even Calculator

Calculate the units or revenue needed to cover fixed costs based on price, variable cost and contribution margin.

Brick Calculator

Work out how many bricks and bags of mortar you need for a wall. Enter length, height and brick type, add a waste factor, and get an instant material count.

BTC to USD Converter

Convert Bitcoin to US dollars at the current live rate. Also shows satoshis, mBTC and supports reverse USD-to-BTC conversion.

BTU Calculator

Estimate the BTU per hour and the AC size in tons you need to cool a room. Enter room dimensions, ceiling height, sun exposure and occupants for an instant result.

Budget Calculator

Plan monthly income against needs, wants and savings using the 50/30/20 rule, or build a zero-based budget line by line.

Buoyancy Calculator

Calculate buoyant force with the Archimedes formula F = ρ·V·g. Enter fluid density and submerged volume to get the upward force in newtons and the mass of fluid displaced in kilograms.

Business Loan Calculator

Calculate monthly payment, total interest and APR for term loans, SBA loans and lines of credit. Supports fees and balloon payments.

Butter Cups to Grams Converter

Convert butter from US cups to grams: 1 cup = 227 g, 1/2 cup = 113 g. Plus ounces, tablespoons and stick equivalents for precise baking.

Butter Sticks to Grams Converter

Convert US butter sticks to grams. 1 stick = 113 g = 1/2 cup = 8 tbsp. Handles fractional sticks and half-sticks with exact equivalents.

Caffeine Half-Life Calculator

Estimate caffeine levels over time given intake, time of day and personal half-life. See the sleep-safe cutoff window.

CAGR Calculator

Calculate the compound annual growth rate (CAGR) of an investment from its beginning value, ending value and holding period. See total growth and the growth multiple too.

Calendar Date Series Generator

Generate a list of dates from a pattern: every Monday, every 2nd Friday, the 15th of every month, or any custom recurrence.

Calories Burned Calculator

Estimate the calories you burn during any workout from your body weight, the activity and how long you did it, using science-based MET values.

Calories to Joules Converter

Convert calories to joules using either the thermochemical calorie (4.184 J) or the International Table calorie (4.1868 J).

Capacitive Reactance Calculator

Calculate capacitive reactance Xc from frequency and capacitance. Enter frequency in Hz and capacitance in µF and get the reactance in ohms (Ω) instantly.

Capacitor Charge & Energy Calculator

Calculate the charge and stored energy of a capacitor from its capacitance and voltage using Q = C·V and E = ½·C·V², with readable mC/µC and mJ/µJ results.

Capital Gains Tax Calculator

Estimate US federal capital gains tax on stocks, crypto, real estate and other assets. Short vs long-term holding, income bracket aware.

Cap Rate Calculator

Calculate the capitalization rate of any rental property from its purchase price, gross income and operating expenses. See the cap rate %, net operating income and monthly NOI instantly.

Car Lease Calculator

Calculate a car lease monthly payment using capitalized cost, residual value, money factor and term. Includes taxes and acquisition fee.

Car Loan Calculator

Estimate a car loan payment from the amount financed, APR and term. Compare total interest, longer terms and extra principal payments.

Carpet Calculator

Calculate how much carpet you need in square yards, square feet and square metres, with a waste factor for seams and trimming, plus the total material cost.

Cash Back Calculator

Estimate annual cash back rewards from your credit card by spending category. Compare multiple cards and annual fees to find the best net return.

Cash-Out Refinance Calculator

Calculate the impact of a cash-out refinance: new monthly payment, cash proceeds, closing costs and the break-even vs. your current loan.

Cat Age Calculator

Convert your cat's age to human years using vet-adjusted mapping. Accounts for faster aging in kittens and slower later-life progression.

Catalytic Converter Replacement Cost Calculator

Estimate catalytic converter replacement cost from parts, labor, diagnostics, fees and tax, with an itemized total and practical planning range.

Cat Food Calculator

Calculate daily calories and food portions for your cat by weight, age and activity level. Works for dry, wet and mixed feeding.

Celsius to Kelvin Converter

Convert Celsius to Kelvin by adding 273.15. Used in chemistry, physics and engineering. Reverse direction included.

CM to Inches Converter

Convert centimetres to inches using the exact 2.54 cm/inch definition. Supports fractional inch output (nearest 1/16, 1/32).

Compound Interest Calculator

Project savings or investment growth with compound interest. Model an opening balance, regular contributions, annual rate, compounding frequency and time horizon.

Dividend Calculator

Estimate annual dividend income, current yield, yield on cost and reinvested growth from shares, price, dividend per share and dividend growth assumptions.

Investment Calculator

Estimate future investment value from a starting balance, monthly contributions, annual return and time horizon, with inflation-aware planning notes.

Laplace Transform Calculator

Find common Laplace transforms for constants, powers, exponentials, sine and cosine terms with a clear formula, convergence region and worked example.

Long Division Calculator

Divide whole numbers with long-division steps. Get quotient, remainder, decimal expansion and a digit-by-digit table for checking schoolwork.

Money Counter

Count cash by US bills, loose coins and standard coin rolls. Enter each denomination count to get bill totals, coin value, pieces and a grand total.

What Is My IP

Instantly see the public IP address your browser presents to the internet, whether it is IPv4 or IPv6, and the country it maps to. One-click copy, no login, nothing stored.

IP Address Lookup

Look up any public IPv4 or IPv6 address for approximate country, region, city, coordinates, ISP, ASN, organization and timezone.

WHOIS Lookup

Look up public WHOIS registration data for a domain: registrar, nameservers, status codes and expiry dates.

DNS Lookup

Query DNS records for any domain straight from the browser. A, AAAA, MX, TXT, NS, CNAME and SOA types supported.

Reverse DNS Lookup

Look up the PTR record for an IPv4 or IPv6 address. Useful for mail-server debugging, log analysis and spam-filter investigations.

Speed Test

Run a fast, free, browser-based internet speed test. Measure your download speed in Mbps plus round-trip latency and jitter, and see whether your connection is ready for 4K streaming, gaming and video calls — no app, no signup.

M4A to MP3 Converter

Convert M4A audio to MP3 for wider playback support. Upload an .m4a file and download a compatible .mp3 copy.

MKV to MP4 Converter

Convert MKV videos to MP4 for smoother playback on iPhone, iPad, QuickTime, browsers, TVs and editors. Upload a .mkv file and download a compatible .mp4.

A1Z26 Cipher Encoder

Encode text using the A1Z26 cipher (A=1, B=2, ... Z=26) or decode a number sequence back to letters, with customizable separator.

AES Encrypt / Decrypt

Encrypt and decrypt low-risk text with AES OpenSSL ciphers. The passphrase is hashed with SHA-256 and the Base64 output is IV plus ciphertext.

Atbash Cipher Encoder

Encode or decode text with the Atbash cipher, a Hebrew substitution that maps A-Z to Z-A. Same operation encrypts and decrypts.

Base32 Encoder and Decoder

Encode and decode Base32 strings using the RFC 4648 alphabet. Useful for TOTP secrets, case-insensitive tokens and human-typed identifiers.

Base85 Encoder and Decoder

Encode and decode Base85 in Adobe Ascii85 (PostScript/PDF) or Z85 (ZeroMQ) variants. More compact than Base64 for binary data.

bcrypt Generator

Generate a bcrypt hash from a plaintext password. Adjustable cost factor from 4 to 14, compatible with Laravel, Django, Node and PHP.

bcrypt Hash Generator

Generate bcrypt hashes or verify a plaintext password against an existing bcrypt hash. Side-by-side generate and verify in one tool.

Caesar Cipher Encoder

Encrypt and decrypt text using the Caesar cipher. Any shift 1-25, supports ROT13 as a special case, preserves punctuation and case.

TikTok Character Counter

Count TikTok caption characters in real time, see remaining space against the 2,200-character target, and track hashtags while you write.

Twitter / X Character Counter

Count characters for X / Twitter posts against the 280-character limit. HTTP and HTTPS links are weighted as 23 characters, matching X's t.co URL rule.

Grammar Checker

Quick grammar and spelling pass for English text: fixes common typos, missing apostrophes in contractions and repeated words.

Word Scrambler

Scramble the letters of each word in a text while keeping the first and last letters intact. Great for puzzles and games.

Fantasy Name Generator

Generate fantasy character names by race, class and gender for D&D campaigns, fiction worldbuilding and video game NPC lists.

Random Word Generator

Generate random English word lists. Choose everyday, nature, creative, or tech words, set length and count, then copy the result.

Paraphrasing Tool

Rewrite English sentences with synonym, shorten, formal and simplify modes, then review meaning and attribution before publishing.

English Spell Checker

Paste English text to flag common misspellings from a curated typo list, review suggestions, and copy the corrected version.

Transition Word Counter

Count 18 English transition words and phrases in your draft. See totals, per-word counts and density as a share of all words.

Acronym Generator

Generate acronyms from a phrase, project name or topic. Pick the length and tone, then shortlist pronounceable names that are easier to remember.

ACS Citation Generator

Create an ACS-style reference for journal articles, books, chapters, and websites with DOI, URL, pages, and access date fields.

Adverb Highlighter

Paste English text to highlight words ending in -ly, with total and unique matches. Review false positives and non-ly adverbs manually.

AMA Citation Generator

Create AMA-style references for journal articles, books, websites, and chapters with author initials, DOI, URL, and access-date guidance.

Bibliography Generator

Generate correctly formatted bibliography entries in APA 7, MLA 9, Chicago 17 and Harvard. Books, journals, websites, films and more.

ATS Resume Checker

Compare your resume with a job description, review keyword coverage and standard sections, and get a transparent ATS-readiness checklist.

Baby Name Generator

Generate baby name ideas filtered by gender, origin, first letter, length and style. Fresh lists every click; save favourites to compare.

Baby Sleep Schedule Generator

Generate an age-appropriate sleep schedule for your baby from newborn to 3 years, based on total sleep need, wake windows and nap count.

Band Name Generator

Generate band name ideas by genre, mood, lineup and keyword, then copy a shortlist with practical checks for pronunciation, merch and trademark research.

Beat Maker

Create simple drum beats in a 16-step browser sequencer with tempo, swing, kits, pattern presets and local Web Audio playback.

Bingo Card Generator

Generate printable bingo cards with random numbers or custom words. Standard 5x5 with a free center square, ready for classroom or party games.

Blossom Solver

Enter the centre letter and six petal letters to find every valid Blossom answer. Sorted by length and highlighted for pangrams.

Metronome

Practice with a precise online metronome. Set BPM, meter, accent and subdivisions, then play a steady browser click locally.