Free Online Calculator

Use our free online calculator plus 200+ specialized calculators for math, finance, health and everyday problems. Fast, accurate, no sign-up.

↓ Browse 200+ calculators

Popular calculators

Basic Calculator Scientific Calculator Mortgage Calculator Income Tax Calculator BMI Calculator Percentage Calculator Loan Calculator Tip Calculator Age Calculator Compound Interest Calculator

Categories

Finance Mortgages, loans, savings and investment math. Tax & Salary Income tax, take-home pay, VAT and sales tax by country. Health & Fitness BMI, calories, body metrics and fitness. Math Percentages, fractions, algebra, geometry. Statistics Averages, probability, tests and distributions. Unit Converters Length, weight, temperature, data and more. Science & Engineering Physics, electronics and chemistry tools. Date & Time Age, date differences, durations, timers. Everyday Tips, grades, fuel and day-to-day math. Graphing & Advanced Scientific, graphing, geometry and 3D calculators.

Browse all 200+ calculators →

Instant & freeNo sign-up, no downloads, no ads clutter. Every calculator runs the moment the page loads.

200+ calculatorsFinance, health, math, statistics, science, conversions, dates and everyday tools — all in one place.

Any deviceMobile-first and fast. Results update as you type, with clear breakdowns, charts and schedules.

100 languagesFully translated so anyone can calculate in their own language, with local currencies and units.

Free online calculators for every problem

Calculator.Free is a free collection of 200+ online calculators for money, health, math and everyday life. Work out a mortgage or loan payment, estimate income tax, check your BMI or daily calories, solve an equation, convert units, or plan a project — each tool is fast, accurate and works on any device, with no sign-up required.

Every calculator shows a clear result the moment you type, plus detailed breakdowns, charts and amortization or projection tables where they help. Financial and health tools adapt to your country's currency, tax bands and units, and the whole site is translated into 100 languages.

Frequently asked questions

Are the calculators really free?

Yes — every calculator on Calculator.Free is completely free to use, with no sign-up, no download and no limits.

How accurate are the results?

Each calculator uses standard, published formulas (for example the amortization formula for loans or Mifflin-St Jeor for calories) and states the method it uses. Results are precise estimates for guidance, not professional financial, medical or tax advice.

Do I need to create an account?

No account is needed. Open any calculator and start immediately — nothing is stored and no personal details are required.

Which calculators do you have?

200+ across finance, health & fitness, math, statistics, science & engineering, unit conversion, date & time and everyday life. Browse the full list on the All Calculators page.

Can I use the calculators in my own language?

Yes. The site is translated into 100 languages — use the language menu, and financial tools switch to your local currency and tax rules.