Calculate

Quick calculators for everyday math.

Percentages, ratios, temperatures and body-mass — instant answers, computed in your browser. Nothing is uploaded, nothing is stored.

Percentage Calculator

Percentages, three everyday ways.

Runs in your browser · no upload

Aspect Ratio

Resize without distortion.

Runs in your browser · no upload

Temperature

°C · °F · K, live.

Runs in your browser · no upload

BMI Calculator

Body Mass Index, metric or imperial.

Runs in your browser · no upload

Tip Calculator

Split a bill and add a tip.

Runs in your browser · no upload

Discount Calculator

Take a percentage off a price.

Runs in your browser · no upload

Average Calculator

Mean, median, mode and more.

Runs in your browser · no upload

Simple Interest

Interest on a principal over time.

Runs in your browser · no upload

Length Converter

Metric and imperial length units.

Runs in your browser · no upload

Weight Converter

Grams, kilograms, pounds and more.

Runs in your browser · no upload

Data Size Converter

Bytes, KB, MB, GB — decimal & binary.

Runs in your browser · no upload

Time Unit Converter

Milliseconds to years, both ways.

Runs in your browser · no upload

Area Converter

Square metres, acres, hectares and more.

Runs in your browser · no upload

Speed Converter

m/s, km/h, mph, knots and more.

Runs in your browser · no upload

GCD & LCM

Greatest common divisor and least common multiple.

Runs in your browser · no upload

Loan Payment

Monthly payment on an amortised loan.

Runs in your browser · no upload

FAQ

Do these calculators run in my browser?: Yes — every calculator here computes locally, so your numbers never leave your device.
Are the results exact?: They use the standard formulas at full precision, rounded only for readability.