Convert Meters to Millimeters
m to mm · length conversion
What are meters and millimeters?
The meter is the SI base unit of length, defined by the distance light travels in 1/299,792,458 of a second. A millimeter is one-thousandth of a meter, about the thickness of a credit card. For scale: a doorway is about 2 m (6.6 ft) tall, and a marathon is 42.2 km (26.2 mi).
How to convert meters to millimeters
1 m = 1,000 mm. To convert, multiply the number of meters by 1,000. For example, 5 m = 5,000 mm, and 20 m = 20,000 mm. To go the other way, multiply millimeters by 0.001 (since 1 mm = 0.001 m).
Meters to Millimeters conversion table
| Meters (m) | Millimeters (mm) |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 50 | 50,000 |
| 100 | 100,000 |
FAQ
What is 1 m in mm?
1 m = 1,000 mm. To convert any amount, multiply the number of meters by 1,000.
How do I convert millimeters back to meters?
Go the other way: 1 mm = 0.001 m, so multiply millimeters by 0.001 to get meters.
Is a meter bigger than a millimeter?
Yes — 1 m is the larger unit, equal to 1,000 mm.
Are these length conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.