Convert Units of Length
Enter a value, choose the unit you have and the unit you need, and the result appears immediately. Below it you see the same length in every other unit and a quick table for common values, so you can compare at a glance — from nanometres to nautical miles.
Imperial units use the international definitions: one inch is exactly 2.54 cm, one foot is 30.48 cm and one mile is 1,609.344 m. Everything is calculated in your browser.
Why Use This Length Converter?
- Metric and imperial units: m, cm, mm, km, in, ft, yd, mi, nmi
- Result as you type, with a swap button
- The value in all units at once, plus a quick conversion table
- Exact international conversion factors
How to Convert Length
- Type the value you want to convert
- Choose the units in the "From" and "To" lists
- Read the result or copy it with one click
Frequently Asked Questions
Is this length converter free?
Yes, it is completely free and has no limits.
How many centimetres are in an inch?
Exactly 2.54 centimetres. Since 1959 the inch has been defined as 25.4 mm, so one foot (12 inches) is 30.48 cm and one yard (3 feet) is 91.44 cm.
How many feet are in a metre?
One metre is about 3.28084 feet, or 3 feet and 3.37 inches. To go the other way, one foot is 0.3048 metres. One kilometre is about 0.621371 miles.
Is any data sent to a server?
No. All conversions are calculated in your browser.