Convert a length between metric and imperial units instantly, with the result shown to sensible precision.
Try an example
Load a ready-made sample into this tool and run it. Every result you see is calculated live by the tool itself — nothing here is a pre-written answer.
Sample: value: 1; from: km; to: mi
How to Use
- Enter a length value.
- Choose the current unit and the target unit.
- Read the converted length.
What this length converter does
This length converter converts lengths between millimetres, centimetres, metres, kilometres, inches, feet, yards, and miles. Enter a value, choose the unit it is in and the unit you need, and read the result instantly. It handles the everyday mix of metric and imperial measurements found in product sizes, travel distances, building and renovation plans, and specifications written for another country's market.
The relationships behind the conversion
Imperial length units are defined against the metric system: 1 inch is exactly 2.54 centimetres, and 1 mile is 1.609344 kilometres. Inside each system the steps are familiar: 100 centimetres make a metre, 12 inches make a foot, and 3 feet make a yard. Because the definitions are exact, converting never changes the real length, only how it is expressed.
Good to know
Conversions use exact defined factors, such as 1 inch equals 2.54 cm, and results are rounded to six decimal places. Rounding at that level is invisible in practical measuring, but for very rough inputs, like a distance paced out on foot, the output should be read as equally approximate.
Frequently asked questions
How do I convert centimetres to inches?
Enter the centimetre value and convert from centimetres to inches. Since 1 inch is exactly 2.54 cm, the tool divides by that factor and shows the result rounded to six decimal places.
How many kilometres is a mile?
One mile is 1.609344 kilometres, often rounded to about 1.61 km for quick estimates. Enter miles and convert to kilometres when you need the precise figure for a distance or speed limit.
Can I convert a height given in feet and inches?
Convert the parts separately and add them, or first turn the whole height into inches. The converter handles one value at a time, so a combined feet-and-inches figure needs that small preparation step.
How to use Length Converter
- Enter a length value.
- Choose the current unit and the target unit.
- Read the converted length.
Limitations
Conversions use exact defined factors (1 inch = 2.54 cm); results round to 6 decimal places.