Unit converters

Fast, exact unit converters that work as you type. No ads in your face, no sign-up.

• cm to inches — 1 inch = 2.54 cm exactly
• kg to lbs — 1 kg = 2.20462 lb
• Celsius to Fahrenheit — Formula: °F = °C × 9/5 + 32
• km to miles — 1 km = 0.621371 miles
• liters to gallons — 1 US gallon = 3.785 L, 1 UK gallon = 4.546 L
• MB to GB — Explains why 1 GB can mean 1000 or 1024 MB and why your drive looks smaller.
• Mbps to MB/s — Divide by 8: a 100 Mbps line downloads at about 12.5 MB/s

Frequently asked questions

Are these converters accurate?

Yes. They use the exact international definitions (for example 1 inch = 2.54 cm and 1 lb = 0.45359237 kg) and show up to 7 significant digits.

Do the converters work offline?

Once the page has loaded, all conversions run in your browser, so they keep working without a connection.