Unit Converter

Convert length, weight, temperature, and area units instantly.

cmCentimetre

0.1

mMetre

0.001

kmKilometre

1.0000e-6

inInch

0.03937008

ftFoot

0.00328084

ydYard

0.001093613

miMile

6.2137e-7

nmiNautical mile

5.3996e-7

About this tool

Convert between hundreds of units across length, weight, volume, temperature, speed, area, energy, and pressure - all in one free browser tool. Type a value and see all equivalent measurements in the selected category simultaneously. Covers metric, imperial, and US customary units with exact conversion factors.

How to Convert Units Online

1Select the unit category (Length, Weight, Temperature, Volume, etc.).
2Enter your value next to the source unit.
3All equivalent values in other units appear instantly.
4Click any unit value to copy it to your clipboard.

Frequently Asked Questions

How do I convert kilometres to miles?+

1 kilometre = 0.621371 miles. Enter your km value in the Length converter and all equivalents appear automatically.

How do I convert Celsius to Fahrenheit?+

Formula: °F = (°C × 9/5) + 32. For example, 100°C = 212°F. Enter the Celsius value in the Temperature converter for an instant result.

How many litres in a gallon?+

1 US gallon = 3.78541 litres. 1 UK (imperial) gallon = 4.54609 litres. Make sure you're using the right gallon - they differ by about 20%.

How do I convert square feet to square metres?+

1 square foot = 0.092903 square metres. Enter your value in the Area converter to see all area units simultaneously.

Looking for a deeper guide on this topic? Browse the Searchlight blog.

Visit the blog →

Related tools

View all Converters →