11 calculators

Conversion Calculators

By Tahir Zaman·Reviewed by the Calculate All Editorial Team·Published 2026-10-05·Updated 2026-10-05

Every unit, converted

Free conversion calculators that run entirely in your browser. Pick a tool below — every formula is shown.

Convert land and floor areas between metric and imperial units.

Quick currency estimates between major world currencies.

Convert bytes, KB, MB, GB, and TB with binary (1024) units.

Convert between mpg and L/100km — the world's two fuel-economy systems.

Convert between metric and imperial lengths with exact factors.

Convert km/h, mph, and m/s — for driving, sport, and physics.

Convert °C, °F, and K with the correct offset formulas.

Convert seconds, minutes, hours, days, and weeks in one click.

Convert length, weight, and temperature — one tool for everyday units.

Convert liters, gallons, cups, and fluid ounces for recipes and more.

Convert between metric and imperial weights with exact factors.

Quick conversion answers

The most-searched conversions, each with its own instant tool, exact factor, and reference tables.

Convert °C to °F instantly — weather, cooking, and fever checks.

Convert cm to ft instantly — height, furniture, and more.

Everyday unit converters in one place — weight, length, distance, temperature.

Convert °F to °C instantly — weather, ovens, and health.

Convert ft to cm instantly — height, rooms, and DIY.

Convert kg to lb instantly with the exact factor — free, no sign-up.

Convert km to mi instantly — travel, running, and cycling.

Convert mi to km instantly — road trips, running, and more.

Convert lb to kg instantly with the exact factor — free, no sign-up.