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Length Converter

Type a value in either box. Results update as you type, in both directions.

Popular conversions

cm to inches inches to cm metres to feet feet to metres km to miles miles to km mm to inches inches to mm metres to yards yards to metres feet to cm nautical miles to km

Useful length facts

One inch is exactly 2.54 centimetres, by international agreement since 1959. A foot is 12 inches (30.48 cm), a yard is 3 feet (91.44 cm) and a mile is 1,760 yards (1.609 km). Nautical miles, used in aviation and at sea, are exactly 1,852 metres.

Frequently asked questions

How many cm are in an inch?

Exactly 2.54 cm.

How many km is a mile?

1 mile is 1.609344 km.