Length Converter

Convert length and distance between metric, imperial and US units — mm, cm, m, km, inches, feet, yards, miles, nautical miles and more.

What is the Length Converter?

Length measures how long something is. India uses metric units officially, but feet and inches remain common for height, property and construction.

How does it work?

Every unit is defined by an exact factor relative to the metre. The value is converted to the metre and then to the target unit, so any pair of units can be converted consistently. Results are shown with up to 10 significant digits.

Formula

1 in = 2.54 cm (exact)
1 ft = 0.3048 m
1 mi = 1.609344 km

Example

10 feet = 3.048 metres. 5 km = 3.10686 miles.

Frequently asked questions

How many centimetres are in a foot?

Exactly 30.48 cm, because 1 inch is defined as 2.54 cm and a foot has 12 inches.

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