Last updated July 29, 2026
Metric length units converted to imperial length units, and back again. Multiply the FROM value by the factor to get the TO value.
| FROM | TO | MULTIPLY BY |
|---|---|---|
| millimetres | inches | 0.03937 |
| inches | millimetres | 25.4 |
| centimetres | inches | 0.3937 |
| inches | centimetres | 2.54 |
| metres | feet | 3.281 |
| feet | metres | 0.3048 |
| metres | yards | 1.094 |
| yards | metres | 0.9144 |
| kilometres | miles | 0.6214 |
| miles | kilometres | 1.609 |
The inch is defined as exactly 25.4 mm, under the 1959 international yard and pound agreement. That makes the foot exactly 0.3048 m, the yard exactly 0.9144 m and the mile exactly 1.609344 km. The factors going the other way are those exact values inverted and rounded, which is why they never look as tidy.