Free calculators, converters, and tools for finance, math, health, and everyday life. No signup. No download. Instant results.
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High-value tools for financial planning and calculations
Calculate your monthly PITI payment, how much home you can afford, and total interest paid.
See exactly when you'll be debt-free and how much interest you'll pay with different payment strategies.
Estimate your US federal tax liability, effective rate, and take-home pay based on 2024–2025 brackets.
Project your retirement nest egg, monthly income, and years until you can retire based on your savings rate.
Convert annual salary to hourly rate and vice versa. See monthly, bi-weekly, weekly, and daily breakdowns.
Calculate how your money grows with compound interest. Perfect for investments, savings, and retirement.
Monthly payments, total interest paid, and full amortization schedule for any loan or mortgage.
Convert between 30+ world currencies including USD, EUR, GBP, JPY, MXN, CAD, AUD and more.
Calculate how inflation has affected purchasing power using historical US CPI data from 2000–2025.
Calculators for students, professionals, and curious minds
6 modes: X% of Y, percent change, discounts, add/subtract percentage, and find the original value.
Advanced calculator with trigonometric functions, logarithms, exponents, square roots, and constants.
Add, subtract, multiply and divide fractions with step-by-step solutions. Auto-simplifies results.
Add your courses, credit hours, and letter grades to instantly calculate your semester and cumulative GPA.
Practical tools for health, wellness, and everyday needs
Calculate your BMR and daily calorie needs based on age, weight, height, and activity level.
Calculate tip amount, total bill, and split evenly between any number of people. Quick 15/18/20/25% buttons.
Find the best times to sleep or wake up based on 90-minute sleep cycles for maximum restfulness.
Calculate exact days, weeks, and months between any two dates. Includes working days calculation.
Calculate your Body Mass Index with metric or imperial units. Visual gauge and healthy weight range.
Find your exact age in years, months, weeks, days, and hours. Days until next birthday included.
Convert length, weight, temperature, and volume between metric and imperial. Full conversion tables.
Tools that make you think and explore
Discover your Life Path Number and Expression Number based on your name and birth date.
Built for speed, accuracy, and zero friction
All calculations run in your browser in real time. No server round-trips.
We never store your data. Everything stays on your device. No account required.
Full bilingual support. Switch between English and Spanish with one click.
Every tool is free forever. No premium tiers, no paywalls, no hidden costs.