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Unit conversion reference
Convert millimeters to inches, centimeters, meters and feet with exact factors, common values and a live length converter.
The live converter uses the same standard factor system as MAXScanner’s full Length Converter.
Length conversion uses standard metric and customary conversion factors.
A millimeter is one-thousandth of a meter. It is a common SI length unit for small dimensions and technical measurements.
To convert millimeters, multiply the millimeter value by the factor for the target unit.
These values are calculated from the same factors shown above, so the table is a quick reference rather than a separate set of rounded constants.
| mm | in | cm | m | ft |
|---|---|---|---|---|
| 1 | 0.03937008 | 0.1 | 0.001 | 0.00328084 |
| 2 | 0.07874016 | 0.2 | 0.002 | 0.00656168 |
| 5 | 0.19685039 | 0.5 | 0.005 | 0.0164042 |
| 10 | 0.39370079 | 1 | 0.01 | 0.0328084 |
| 25 | 0.98425197 | 2.5 | 0.025 | 0.082021 |
| 50 | 1.96850394 | 5 | 0.05 | 0.16404199 |
| 100 | 3.93700787 | 10 | 0.1 | 0.32808399 |
Type the number of millimeters you have.
Pick the unit required by the drawing, form, specification or calculation.
Use the factor or common-value table when you need to double-check the conversion.
A millimeter is one-thousandth of a meter. It is a common SI length unit for small dimensions and technical measurements.
To convert millimeters, multiply the millimeter value by the factor for the target unit.
Yes. Use the live Length Converter on this page for any supported source and target unit, or open the full converter for the complete unit list.
Open the full Length Converter for every supported unit in this family. Unit conversion changes how the same measurement is expressed; it does not change the underlying physical quantity.
Open Length Converter