What is a millimeter?
Definition
mm
The millimeter (mm) is a metric unit equal to one thousandth of a meter, used in engineering and manufacturing.
Unit system
Metric
Convert millimeters
All length units
| Unit | Symbol | System |
|---|---|---|
| nanometers | nm | Metric |
| micrometers | μm | Metric |
| millimeters | mm | Metric |
| centimeters | cm | Metric |
| meters | m | Metric |
| kilometers | km | Metric |
| inches | in | Imperial / US |
| feet | ft | Imperial / US |
| yards | yd | Imperial / US |
| miles | mi | Imperial / US |
| nautical miles | nmi | Nautical & Aviation |
| light years | ly | Scientific & Astronomical |