Length Converter
Quickly convert a length or distance between metric and imperial units - no sign-up, and nothing leaves your browser.
About the Length Converter
This tool converts a single distance between common metric and imperial length units, including millimetres, centimetres, metres, kilometres, inches, feet, yards and miles. Type one value and every other unit updates at once, so you can read off the equivalent without juggling conversion factors by hand.
How to use it
- Enter the number you know into the matching unit field, for example a measurement in metres.
- Read the converted result straight from the feet, inches or kilometres fields.
- Edit any field at any time - the conversion is two-way, so you can start from imperial just as easily.
A common use is translating a height or room measurement between systems, such as turning 1.83 m into roughly 6 ft. Conversions use exact factors (1 inch is defined as 25.4 mm), so figures are accurate, though the display rounds long decimals. Everything runs in your browser, so no measurement you type is ever uploaded.
Frequently asked questions
How many feet are in a metre?
One metre equals about 3.281 feet. The conversion factor is exact because a foot is defined as 0.3048 metres, so 1 metre divided by 0.3048 gives 3.28084 feet.
How do I convert kilometres to miles?
Multiply kilometres by 0.621371 to get miles. For example, 10 km is about 6.21 miles. Enter the value in the kilometre field and read the result from the miles field.
Is an inch exactly 2.54 centimetres?
Yes. The international inch has been defined as exactly 2.54 cm (25.4 mm) since 1959, so inch-to-centimetre conversions here are exact rather than approximate.
Does this length converter work offline or upload my data?
It runs entirely in your browser using JavaScript. Nothing you enter is sent to a server, and once the page has loaded the converter keeps working without an internet connection.