Millimeter (mm)
One thousandth of a meter; the standard fine unit on metric rulers.
Result
1 millimeter = 0.1 centimeters
Millimeter at a glance
| Unit name | Millimeter (plural: millimeters) |
|---|---|
| Symbol | mm |
| Quantity measured | Length |
| Measurement system | Metric |
| Also known as | millimetre, millimetres, mm |
| Definition exact? | Yes — exact by definition |
1 millimeter in other length units
| Unit | 1 mm equals |
|---|---|
| Nanometer | 1,000,000 nm |
| Micrometer | 1,000 µm |
| Centimeter | 0.1 cm |
| Decimeter | 0.01 dm |
| Meter | 0.001 m |
| Kilometer | 0.000001 km |
| Inch | 0.039370079 in |
| Foot | 0.00328084 ft |
| Yard | 0.001093613 yd |
| Mile | 0.000000621 mi |
| Nautical mile | 0.00000054 nmi |
| Angstrom | 10,000,000 Å |
| Mil | 39.3700787 mil |
| Fathom | 0.000546807 ftm |
| Rod | 0.000198839 rd |
| Chain | 0.00004971 ch |
| Furlong | 0.000004971 fur |
| League | 0.000000207 lea |
| Astronomical unit | 6.68458712 × 10⁻¹⁵ au |
| Light-year | 1.05700083 × 10⁻¹⁹ ly |
| Parsec | 3.24077929 × 10⁻²⁰ pc |
Popular millimeter conversions
Frequently asked questions
- What is a millimeter?
- One thousandth of a meter; the standard fine unit on metric rulers.
- What is the symbol for the millimeter?
- The symbol for the millimeter is mm. It measures length.
- How many centimeters are in a millimeter?
- 1 millimeter = 0.1 centimeters.
- How many meters are in a millimeter?
- 1 millimeter = 0.001 meters.
- How many kilometers are in a millimeter?
- 1 millimeter = 0.000001 kilometers.