Millimeters to Inches Converter
Convert millimeters (mm) to inches (in), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Convert a length from one unit to another. For inches, feet and yards you also get feet and inches with a tape-measure fraction.
Show the working
- 1 mm = 0.0393700787402 in
- 1 × 0.0393700787402 = 0.0393700787402 in
How to convert millimeters to inches
1 mm = 0.0393700787402 in, so multiply by 0.0393700787402 to go from millimeters to inches. Going the other way, 1 in = 25.4 mm.
in = mm × 0.0393700787402 mm = in × 25.4
Worked example:
1 mm = 0.0393700787402 in 5 × 0.0393700787402 = 0.196850393701 in
Millimeters to inches table
| Millimeters | Inches |
|---|---|
| 1 mm | 0.0393700787402 in |
| 2 mm | 0.0787401574803 in |
| 3 mm | 0.11811023622 in |
| 4 mm | 0.157480314961 in |
| 5 mm | 0.196850393701 in |
| 6 mm | 0.236220472441 in |
| 7 mm | 0.275590551181 in |
| 8 mm | 0.314960629921 in |
| 9 mm | 0.354330708661 in |
| 10 mm | 0.393700787402 in |
| 15 mm | 0.590551181102 in |
| 20 mm | 0.787401574803 in |
| 25 mm | 0.984251968504 in |
| 30 mm | 1.1811023622 in |
| 40 mm | 1.57480314961 in |
| 50 mm | 1.96850393701 in |
| 75 mm | 2.95275590551 in |
| 100 mm | 3.93700787402 in |
| 250 mm | 9.84251968504 in |
| 500 mm | 19.6850393701 in |
| 1000 mm | 39.3700787402 in |
About the units
- Millimeters (mm)
- Millimeters, a metric unit. Definition: BIPM SI Brochure (SI prefixes).
- Inches (in)
- Inches, a US customary unit. Definition: NIST Handbook 44 Appendix C (international yard and pound, 1959).