Everyday Tools Calculators & Tools
Age, Date, Random Number, GPA, Tip, Discount, and more daily-use calculators.
These are the practical calculators you reach for in daily life, from working out an age or a date to splitting a tip or checking a discount. Each one is built to give a clear answer fast, with a short explanation when the math is not obvious.
Age Calculator
Calculate exact age in years, months, and days. Use this free calculator for fast, accurate answers, complete with the formula and a worked example.
Alcohol Dilution Calculator
Calculate water to add to dilute a spirit to a target ABV.
Appliance Energy Cost Calculator
Estimate the running cost of an appliance from its wattage.
Audiobook Length Calculator
Estimate listening time at different playback speeds.
Baby Name Generator
Generate baby name ideas by style and first letter.
Bath vs Shower Water Calculator
Compare water used by a bath versus a shower.
Social Media Bio Generator
Generate a short bio from your name, role and interest.
Boat Speed Calculator
Convert boat speed between knots, mph and km/h.
Bra Size Calculator
Estimate bra size from band and bust measurements.
Business Days Calculator
Count working days between two dates (excluding weekends).
Business Name Generator
Generate business name ideas from a keyword.
Butter Converter
Convert butter between grams, ounces, cups, sticks and tablespoons.
Caffeine Intake Calculator
Track caffeine from drinks against the safe daily limit.
Cake Pan Converter
Scale a recipe when changing cake pan size.
Camp Cooking Calculator
Plan camp meal quantities for a group and number of days.
Carbon Footprint Calculator
Estimate annual CO₂ from driving, flights and electricity.
Cocktail Finder
Find a cocktail to make from a base spirit.
Cocktail Ratio Scaler
Scale a cocktail recipe up to a number of servings.
Coffee Carbon Footprint Calculator
Estimate the annual CO₂ from your coffee habit.
Coffee Caffeine Timing Calculator
Estimate caffeine remaining in your body over time.
Coffee Ratio Calculator
Calculate coffee and water amounts from a brew ratio.
Coin Flip
Flip one or more virtual coins and see the results.
Commute Cost Calculator
Calculate the yearly time and fuel cost of your commute.
GPS Distance Calculator
Calculate the great-circle distance between two coordinates.
Countdown Calculator
Count the days, hours and minutes until a future date.
Compass Bearing Calculator
Calculate the initial bearing between two coordinates.
Date Difference Calculator
Calculate the difference between two dates.
Dice Roller
Roll any number of dice with any number of sides.
Discount Calculator
Calculate the final price after discount.
Distance Converter
Convert distance between km, miles, metres, feet and nautical miles.
Dress Size Converter
Convert dress sizes between US, UK, EU and AU.
Egg Boiling Timer
Find the perfect boiling time for eggs by doneness and size.
Electricity Cost Calculator
Calculate electricity cost of an appliance.
Elevation Gain Calculator
Sum the total ascent from a list of waypoint elevations.
Emoji Picker
Find emoji by category to copy into your text.
ETA Calculator
Estimate your arrival time from distance and speed.
Test Credit Card Number Generator
Generate Luhn-valid test card numbers for development.
Fantasy Name Generator
Generate fantasy character names by race style.
Firewood Calculator
Estimate firewood needed for the heating season.
Flight Time Calculator
Estimate flight duration from distance and cruise speed.
Fuel Cost Calculator
Calculate the fuel cost of a trip.
Garden Soil Calculator
Calculate soil or compost volume for a garden bed.
GPA Calculator
Calculate Grade Point Average from letter grades.
Grade Calculator
Calculate your weighted course grade from assessment scores.
Grocery Budget Calculator
Estimate a monthly grocery budget for your household.
Hashtag Generator
Generate relevant hashtags from a topic keyword.
Coffee Calorie Calculator
Estimate the calories in your coffee order.
Height Converter
Convert height between feet/inches and centimetres.
Hiking Time Calculator
Estimate hike duration with Naismith's rule.
Home Buying Checklist
A step-by-step checklist for buying a home.
Distance to Horizon Calculator
Calculate how far you can see to the horizon from a height.
Hours Calculator
Calculate hours worked between a start and end time.
Hull Speed Calculator
Calculate a displacement boat's theoretical hull speed.
Fancy Text / Font Generator
Convert text into stylish Unicode fonts for social bios.
Jet Lag Recovery Calculator
Estimate how many days to adjust after crossing time zones.
Kitchen Measurement Converter
Convert cooking volumes between cups, tbsp, tsp and ml.
Life Expectancy Estimator
A rough life-expectancy estimate from age and lifestyle factors.
Love Calculator
Calculate love compatibility (just for fun!).
Meeting Cost Calculator
Calculate the real cost of a meeting in salaries.
Military Time Converter
Convert between 12-hour and 24-hour (military) time.
Moving Checklist
A checklist for an organized house move.
Nautical Unit Converter
Convert nautical miles, knots and fathoms.
Travel Packing Checklist
A checklist of travel packing essentials.
Paint Calculator
Calculate paint needed for a room.
Party Planner Calculator
Estimate food and drinks needed for a party.
Password Generator
Generate a strong random password.
Pet Name Generator
Generate pet name ideas by animal and vibe.
Pizza Dough Calculator
Calculate dough ingredients by number and size of pizzas.
Pomodoro Session Planner
Plan focus sessions and breaks for a work block.
Pool Volume Calculator
Calculate swimming pool volume in litres and gallons.
Random Number Generator
Generate random numbers within a range.
Random Playing Card
Draw one or more random playing cards.
Random Color Generator
Generate a random color with HEX and RGB values.
Random Country / City Picker
Pick a random country or city for travel inspiration.
Random Date Generator
Generate a random date within a range.
Random Letter Generator
Generate random letters of the alphabet.
Random Name Picker: Select Winners & List Draws
Draw random names or pick a winner from any list. Ideal for giveaways, raffles, classroom tasks, and games.
Username Generator
Generate available-looking username ideas.
Recipe Scaling Calculator
Scale recipe ingredient amounts up or down.
Restaurant Opening Checklist
A checklist for opening a restaurant.
Rice & Pasta Portion Calculator
Calculate dry rice or pasta per person.
Rice Per Person Calculator
Work out how much rice to cook for a group.
Ring Size Calculator
Find ring size from finger circumference.
Signal Visibility Calculator
Estimate how far a light or signal is visible to the horizon.
Sourdough Calculator
Calculate sourdough ingredients from total dough weight.
Sourdough Hydration Calculator
Calculate dough hydration including the starter.
Spin the Wheel
Randomly pick one option from a list.
Startup Launch Checklist
A checklist for launching a startup.
Steak Cooking Time Calculator
Get pan-frying times for steak by thickness and doneness.
Steps to Calories Calculator
Estimate calories burned from steps walked.
Stopwatch
A simple start/stop stopwatch in your browser.
Survival Water Calculator
Calculate emergency drinking water for your household.
Online Tally Counter: Clicker & Score Tracker
Keep count online. Click to count up or down, track multiple tally lists, and save your scores easily.
Time Calculator
Add or subtract hours, minutes and seconds.
Tire Size Calculator
Calculate tire diameter and circumference from its size code.
Turkey Cooking Time Calculator
Calculate roasting time for a turkey by weight.
TV Series Binge Calculator
Calculate total watch time for a TV series.
Unit Price Calculator
Compare products by price per unit.
Waist-to-Height Ratio Calculator
Calculate your waist-to-height ratio as a health indicator.
Daily Water Intake Calculator
Estimate how much water to drink per day.
Wedding Alcohol Calculator
Estimate drinks needed for a wedding reception.
Wedding Planning Checklist
A checklist for planning a wedding.
Fun Unit Converter
Convert a length into quirky units like bananas and football fields.
Yeast Converter
Convert between fresh, active dry and instant yeast.
How to choose the right Everyday Tools tool
- Dates and ages? Use the age and date-difference tools.
- Shopping? The discount and tip calculators save the mental math.
- School grades? The GPA tool adds them up correctly.
- Most of these need only one or two inputs, so they are quick by design.
Who these tools are for
For everyone: shoppers, students, parents, and anyone who wants a fast answer to a common question.
Need Help Solving a Problem?
Our AI Math Solver handles any math problem, just type it in plain English and get instant step-by-step solutions.
Explore Other Categories
Popular tools from our other scientific categories
Absolute Value Calculator
Calculate the absolute value of any number. Use this free calculator for fast, accurate answers, complete with the formula and a worked example.
AC to DC Converter Calculator
Convert AC voltage to DC voltage for different rectifier configurations. Free online calculator with instant, step-by-step results.
Acid-Base Titration Calculator
Calculate concentration from titration data. Get quick, accurate results with this free online calculator, including formulas and worked examples.
ABV Calculator
Calculate alcohol by volume from original and final gravity. Free calculator with instant calculations, the underlying formula, and an easy-to-follow example.
Amortization Schedule Calculator - Free Online
Free Generate a complete amortization schedule. Step-by-step solutions and formulas included. Free, accurate results with step-by-step explanations.
Average Cost Basis Calculator - Free Online
Free Calculate average cost per share. Step-by-step solutions and formulas included. Fast, accurate, and free, with formula and example.
1031 Exchange Calculator - Free Online
Free Calculate tax deferral in a 1031 exchange. Step-by-step solutions and formulas included. Fast, accurate, and free, with formula and example.
A1C Calculator - Free Online
Free Convert between A1C percentage and estimated average glucose. Step-by-step solutions and formulas included. Simple, fast, and free.
Batting Average Calculator
Calculate batting average in baseball/cricket. Free calculator with instant calculations, the underlying formula, and an easy-to-follow example.
Air Density Calculator
Calculate air density from temperature and pressure using the ideal gas law. Fast, accurate, and free, with formula and example.
Acceleration Converter
Convert between acceleration units. Get quick, accurate results with this free online converter, including formulas and worked examples.
Circle Area Calculator
Calculate the area and circumference of a circle. Free online calculator with instant results, step-by-step explanations, and a clear worked example.
Angle Between Two Lines Calculator
Calculate the angle between two lines given their slopes. Free calculator with instant calculations, the underlying formula, and an easy-to-follow example.
Apache Log Parser, Free Online Developer Tool
Parse Apache/NGINX combined access log lines into IP, time, request, status and size fields. Get instant results, the formula, and a clear example.
Add Text to Beginning, Free Online Text Tool
Add custom text to the beginning of every line in your text instantly. Get instant results, the formula, and a clear example.
Accessible Color Pair Finder
Check if a text/background pair meets WCAG and suggest a fix. Free tool with instant calculations, the underlying formula, and an easy-to-follow example.
