Length and Area
mmtom
Convert millimetres (mm) to metres (m).
Factor1 mm = 0.001 m
Converter
mm
Accepts numbers or expressions, e.g. 150 + 14.7
Result
m
Rendered to 6 significant figures.
Formula
Formula
m = mm × 0.001
Multiply any value in millimetres by 0.001 to obtain the value in metres.
Worked example
Convert 1000 mm to m.
- 01Start with 1000 mm.
- 02Multiply by the conversion factor: 1000 × 0.001 = 1 m.
Result1000 mm = 1 m
Conversion table
| mm | m |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 200 | 0.2 |
| 500 | 0.5 |
| 1000 | 1 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mm to m?
1 mm equals 0.001 m. To convert, multiply the value in millimetres by 0.001.
How do I convert 1 mm to m?
1 mm = 0.001 m. For any value, multiply by 0.001.
How do I convert m back to mm?
Divide by the same factor — or equivalently, multiply by 1000. So 1 m = 1000 mm.
When would I need to convert millimetre to metre?
Length conversions appear in piping, layout, and mechanical drawings — particularly when reconciling imperial fittings or instrument lengths with metric plant drawings.
Is the conversion exact?
Yes. Both mm and m are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).