Supported length units
Convert between metres, kilometres, centimetres, millimetres, miles, yards, feet and inches. Use the swap control to reverse the direction without re-entering the value.
Common reference points
- 1 kilometre = 1,000 metres
- 1 inch = 2.54 centimetres
- 1 foot = 12 inches
- 1 mile = 1,609.344 metres
Metric and imperial values
Metric units scale in powers of ten. Imperial and US customary length names often overlap, and the supported inch, foot, yard and international mile definitions are exact.
Precision
Results display up to eight decimal places. That is more than enough for ordinary conversions, but engineering, surveying and manufacturing work should preserve the precision required by its source measurement.