Metres to Millimetres Converter
Convert metres (m) to millimetres (mm) instantly. Length conversions come up when reading overseas furniture specs, cycling the Round Island Route in kilometres while a foreign app shows miles, or checking marine distances in the Singapore Strait in nautical miles.
Result
- Millimetres
- 1,000 mm
How to use the metres to millimetres converter
- Enter the metres (m).
- The results update as you type, or press Calculate.
- Read the millimetres first, then the supporting figures below it.
Formula
Millimetres = metres × 1,000
Worked example
For example, with these inputs:
- Metres (m): 1
the calculator returns:
- Millimetres: 1,000 mm
Metres to Millimetres table
| Metres | Millimetres |
|---|---|
| 1 m | 1,000 mm |
| 2 m | 2,000 mm |
| 5 m | 5,000 mm |
| 10 m | 10,000 mm |
| 20 m | 20,000 mm |
| 25 m | 25,000 mm |
| 50 m | 50,000 mm |
| 100 m | 100,000 mm |
| 250 m | 250,000 mm |
| 500 m | 500,000 mm |
| 1,000 m | 1,000,000 mm |
About this conversion
Length conversions come up when reading overseas furniture specs, cycling the Round Island Route in kilometres while a foreign app shows miles, or checking marine distances in the Singapore Strait in nautical miles.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Frequently asked questions
How many millimetres are in one metre?
1 m = 1,000 mm.
How do I convert m to mm?
Millimetres = metres × 1,000.