About the Length Converter
Length and distance measurements come in many forms depending on your country and field of work. Our length converter bridges the gap between the metric system (millimetres, centimetres, metres, kilometres) and the imperial system (inches, feet, yards, miles), plus specialised units like nautical miles and micrometres.
How it works
Every unit is defined relative to the metre — the SI base unit of length. When you enter a value, the converter first expresses it in metres, then derives all other units from that base. This guarantees consistent, accurate results across all 10 supported units. All calculations are performed entirely in your browser.
Common conversions
One inch equals exactly 25.4 mm. One mile is 1,609.344 metres. One nautical mile is 1,852 metres. Whether you need to convert metres to feet for a building plan, km to miles for a road trip, or inches to cm for a product listing, this tool has you covered.