Mils to Millimeters Converter

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

1 mil = 0.0254 mm
1 mm = 39.37007874 mil

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How to convert mils to millimeters

Use this formula:

mm = mil × 0.0254

Examples

5 mil = 0.127 mm
12 mil = 0.3048 mm
100 mil = 2.54 mm

mil to mm conversion chart

mils (mil)	millimeters (mm)
0.1 mil	0.00254 mm
0.25 mil	0.00635 mm
0.5 mil	0.0127 mm
1 mil	0.0254 mm
2 mil	0.0508 mm
3 mil	0.0762 mm
4 mil	0.1016 mm
5 mil	0.127 mm
6 mil	0.1524 mm
7 mil	0.1778 mm
8 mil	0.2032 mm
9 mil	0.2286 mm
10 mil	0.254 mm
12 mil	0.3048 mm
15 mil	0.381 mm
20 mil	0.508 mm
25 mil	0.635 mm
30 mil	0.762 mm
40 mil	1.016 mm
50 mil	1.27 mm
60 mil	1.524 mm
70 mil	1.778 mm
75 mil	1.905 mm
80 mil	2.032 mm
90 mil	2.286 mm
100 mil	2.54 mm
150 mil	3.81 mm
200 mil	5.08 mm
250 mil	6.35 mm
500 mil	12.7 mm
1,000 mil	25.4 mm

About the units

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

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

Frequently asked questions

How do I convert mils to millimeters?: Multiply the value in mil by 0.0254.
How many millimeters are in 1 mil (thou)?: 1 mil = 0.0254 mm.
What is 12 mil in mm?: 12 mil = 0.3048 mm.
How do I convert millimeters to mils?: Use the reverse converter: mm → mil.

Length Converter →

Related conversions

mm → mil cm → in in → cm m → ft ft → m km → mi mi → km mm → in in → mm ft → cm cm → ft m → yd yd → m ly → km

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