Mm to m
One mm equals 0.001 m. Type any number and the answer appears as you type — the maths happens in your browser.
Result
The same value in every unit
| Unit | Value |
|---|
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Common values
| mm | m |
|---|---|
| 1 mm | 0.001 m |
| 2 mm | 0.002 m |
| 3 mm | 0.003 m |
| 5 mm | 0.005 m |
| 10 mm | 0.01 m |
| 15 mm | 0.015 m |
| 20 mm | 0.02 m |
| 25 mm | 0.025 m |
| 50 mm | 0.05 m |
| 100 mm | 0.1 m |
| 500 mm | 0.5 m |
| 1000 mm | 1 m |
How to use
- Enter the number of mm in the field.
- The result in m updates on every keystroke.
- Use the table below for the values people look up most often.
Formula and reverse conversion
The formula
To convert by hand: m = mm ÷ 1000. Going back the other way, one m is 1000 mm.
Metric units differ by powers of ten
Both units belong to the metric system, so the conversion is a shift of the decimal point: the factor is a power of ten and nothing is lost to rounding.
m = mm ÷ 1000
Frequently asked questions
How many m are in one mm?
One mm is 0.001 m.
How do I convert mm to m?
Multiply by the factor: m = mm ÷ 1000.
Is the result exact?
The factors are the exact legal definitions, and up to ten significant digits are kept in the answer. Rounding happens only in the display.
How do I convert m back to mm?
One m is 1000 mm — or open the reverse page linked below.