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Millimeters to Mils Converter

mm → mil: type a value and the result appears instantly.

1 mm = 39.37007874 mil
1 mil = 0.0254 mm
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How to convert millimeters to mils

Use this formula:

mil = mm × 39.37007874

Examples

mm to mil conversion chart

millimeters (mm)mils (mil)
0.1 mm3.93701 mil
0.25 mm9.84252 mil
0.5 mm19.685 mil
1 mm39.3701 mil
2 mm78.7402 mil
3 mm118.11 mil
4 mm157.48 mil
5 mm196.85 mil
6 mm236.22 mil
7 mm275.591 mil
8 mm314.961 mil
9 mm354.331 mil
10 mm393.701 mil
12 mm472.441 mil
15 mm590.551 mil
20 mm787.402 mil
25 mm984.252 mil
30 mm1,181.1 mil
40 mm1,574.8 mil
50 mm1,968.5 mil
60 mm2,362.2 mil
70 mm2,755.91 mil
75 mm2,952.76 mil
80 mm3,149.61 mil
90 mm3,543.31 mil
100 mm3,937.01 mil
150 mm5,905.51 mil
200 mm7,874.02 mil
250 mm9,842.52 mil
500 mm19,685 mil
1,000 mm39,370.1 mil

About the units

Millimeter (mm) is a metric (SI) unit. 1 mm = 0.1 cm.

Mil (thou) (mil) is a US customary / imperial unit. 1 mil = 0.0254 mm.

Frequently asked questions

How do I convert millimeters to mils?
Multiply the value in mm by 39.37007874.
How many mils are in 1 millimeter?
1 mm = 39.37007874 mil.
What is 12 mm in mil?
12 mm = 472.441 mil.
How do I convert mils to millimeters?
Use the reverse converter: mil → mm.

Length Converter →

Sources: NIST SP 811 · BIPM SI Brochure · NIST Handbook 44. Last reviewed: 2026-10 · FreeUnitConverters