millimetre to inch
Live millimetre (mm) to inch (in) converter. Plus a 10-value reference table and FAQs.
Conversion table
Ten sample values from millimetre to inch. Use the converter above for arbitrary values.
| millimetre (mm) | → | inch (in) |
|---|---|---|
| 0.001 mm | → | 3.9370e-5 in |
| 0.01 mm | → | 0.000394 in |
| 0.1 mm | → | 0.003937 in |
| 0.5 mm | → | 0.019685 in |
| 1 mm | → | 0.03937 in |
| 2 mm | → | 0.07874 in |
| 5 mm | → | 0.19685 in |
| 10 mm | → | 0.393701 in |
| 100 mm | → | 3.937008 in |
| 1,000 mm | → | 39.370079 in |
About the millimetre
1/1000 of a metre. Standard for small machined parts and rainfall.
About the inch
1/12 of a foot or 25.4 mm. Screen sizes, paper, US fastener sizes.
How millimetre to inch conversion works
Both units belong to Length. Unitbox first expresses the input in the category reference unit (m), then expresses that same quantity in inch.
Common uses include plans, dimensions, travel distances, screens, and manufacturing specifications.
Unit definitions and conversion factors are maintained in the Unitbox methodology. Last reviewed with the current conversion dataset.
Frequently asked questions
Frequently Asked Questions
How do I convert millimetre to inch?
Multiply the millimetre value by 0.03937 to get it in inch. For example, 10 mm = 0.3937 in.
What is 1 mm in in?
1 mm = 0.03937 in.
What is 100 mm in in?
100 mm = 3.937 in.
What is the formula?
Linear: multiply by 0.03937 (the unit factor ratio).
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