500+ Free Calculators
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500+ free calculators for finance, tax, health, business, real estate, loans, and everyday math. No signup, no install — just enter your numbers and get a clear answer in your browser.
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Fast paths for what people are calculating now
These shortcuts point visitors from broad discovery pages into high-intent calculators that already exist on SuperCalc.
$200 at 10% for 2 months
Enter principal, annual rate, and month count to verify short-term interest or late-fee math without a spreadsheet.
Open calculator Gig workProp 22 pay adjustment
Estimate California engaged-time and mileage guarantees for Uber, Lyft, DoorDash, and delivery work.
Open calculator Time zonesEST to IST conversion
Convert meeting times between Eastern Time and India Standard Time for remote teams and interviews.
Open calculator HealthcareCOBRA 18-month cost
Compare COBRA premiums against Marketplace options before the 60-day election deadline closes.
Open calculatorFeatured Tools
Mortgage Calculator
Calculate monthly payments, total interest, and amortization schedules for any home loan.
BMI Calculator
Check your Body Mass Index and understand your health category instantly.
Compound Interest
Project investment growth over time with compound interest and regular contributions.
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Full IndexCurated Collections
Homebuyer Toolkit
Mortgage, affordability, closing costs, and rent vs buy analysis
Tax Season 2026
Income tax, capital gains, HSA, and self-employment estimates
ExploreRetirement Suite
401k projections, Roth conversions, FIRE targets, and DCA planning
ExploreBusiness Metrics
ROI, break-even, unit economics, and customer acquisition cost
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Why Choose SuperCalc?
Task-Specific Estimates
Each calculator focuses on a specific task. Methods, assumptions, sources, update dates, and limitations are shown on the page where available.
Fast & Free
Use SuperCalc without payment, registration, or installation. Enter your values and follow the page-specific steps to get an immediate estimate or conversion.
Scoped Data Handling
Calculator arithmetic generally runs in your browser. Analytics, advertising, consent, and feedback services are described in our Privacy Policy.
About SuperCalc
SuperCalc is a free browser-based calculator platform with 500+ tools. Each calculator focuses on a practical task across finance, tax, health, business, time, math, and everyday planning. Enter your values to get an estimate or conversion, then check the page-specific method, assumptions, sources, update date, and limitations where available.
How SuperCalc Compares
- vs paid tools: free to use and no account required
- vs spreadsheets: ready-to-use, task-specific inputs and results; check each page's notes for rules, sources, and update dates
- vs mobile apps: no install required; works in supported desktop and mobile browsers
- vs unexplained answers: page-specific methods, assumptions, examples, and limitations are shown where available
How to Use SuperCalc
Step 1: search for the calculator you need in the box above, or browse the 16 category cards. Step 2: enter the requested values and use the page's primary action. Step 3: review the estimate or conversion together with any method, assumptions, sources, update date, and limitations shown on that page.
Who Uses SuperCalc?
People use SuperCalc for planning, comparison, conversion, and everyday calculation tasks. Results are informational estimates; important financial, tax, legal, medical, or other high-stakes decisions should be checked against the relevant official source or a qualified professional.
Can't Find What You Need?
Tell us which calculator would be useful. We review suggestions against scope, evidence, and maintenance requirements.
Suggest a CalculatorFind the Perfect Calculator
Financial: retirement calculator, 401k, compound interest, investment, savings, net worth, budget, debt payoff
Tax: income tax 2026, capital gains, self-employment tax, payroll, W4, estimated tax, 1099
Real Estate: mortgage, home affordability, refinance, rent vs buy, property tax, amortization
Business: ROI, profit margin, break even, sales tax, markup, conversion rate, CAC
Health: BMI, calorie, pregnancy, body fat, due date, ovulation, tip, age calculator
