Length Converter

How to convert length

1. Type a value in the box for the unit you have.
2. Every other unit updates at the same time.
3. Read the answer from the unit you need.
4. Clear the box to start again.

The units you can use

The tool covers the units people meet most: millimetres, centimetres, metres, and kilometres on the metric side, and inches, feet, yards, and miles on the imperial side. You type once and read any of them, so you can go from feet to metres or from centimetres to inches in one step.

The conversions are exact

Since 1959, one inch has been defined as exactly 2.54 centimetres. From that, one foot is exactly 0.3048 metres and one mile is exactly 1609.344 metres. These are fixed definitions, not rounded guesses, so the tool converts exactly and only trims the display for very long decimals.

Common jobs

Change a height from centimetres to feet and inches, a room size from feet to metres for a form, or a running distance from miles to kilometres. Because every box updates together, you can compare two units side by side without doing the sum twice.

FAQ

How many centimetres are in an inch?

Exactly 2.54. This is a fixed definition, so an inch is always 2.54 cm.

How do I convert my height to feet and inches?

Type your height in the centimetres box. The feet box and the inches idea come from the same value; read feet, then multiply the leftover by 12 for inches.

Are the conversions rounded?

The math is exact. The display trims very long decimals, but the numbers behind it are full precision.

Which units does it support?

Millimetres, centimetres, metres, kilometres, inches, feet, yards, and miles.

Is my data private?

Yes. The conversion runs in your browser and nothing is saved.

Which units can this distance converter handle?

Millimetres, centimetres, metres, kilometres, inches, feet, yards, and miles. Type in any box for an instant length conversion: meters to feet, kilometres to miles, and every other pair. It is one place to convert units of length in both directions.