Unit Converters
5 free tools · Instant, accurate conversions with handy reference tables.
Unit Converter
Convert length, weight, temperature, volume, area and speed between metric and imperial units.
CM to Inches
Type a value to convert instantly. A full conversion chart is below.
KG to LBS
Type a value to convert instantly. A full conversion chart is below.
Fahrenheit to Celsius
Type a value to convert instantly. A full conversion chart is below.
Miles to KM
Type a value to convert instantly. A full conversion chart is below.
Exact conversions, not approximations
All conversions use the exact international definitions: 1 inch = 2.54 cm, 1 pound = 0.45359237 kg, 1 mile = 1.609344 km and °F = °C × 9/5 + 32. Each converter also shows a ready-made chart of common values, so you can print or bookmark it.
| Conversion | Exact factor | Quick mental trick |
|---|---|---|
| cm → inches | ÷ 2.54 | × 0.4 |
| kg → lbs | × 2.20462 | double it, add 10% |
| miles → km | × 1.609344 | × 1.6 |
| °F → °C | (°F − 32) × 5/9 | subtract 30, halve |
Frequently asked questions
Which units does the unit converter support?
Length, weight, temperature, volume (including US cups and gallons), area and speed, in both metric and imperial units.