Millimeters to inches
1 millimeter in inches
1 mm = 0.03937 in
in = mm × 0.03937007874
To convert millimeters to inches, multiply by 0.03937007874. The table below gives the values people look up most often, and the converter works for any number.
Millimeters to inches table
| Millimeters | Inches |
|---|---|
| 1 mm | 0.03937 |
| 2 mm | 0.07874 |
| 3 mm | 0.11811 |
| 4 mm | 0.15748 |
| 5 mm | 0.19685 |
| 10 mm | 0.3937 |
| 15 mm | 0.59055 |
| 20 mm | 0.7874 |
| 25 mm | 0.98425 |
| 30 mm | 1.181102 |
| 40 mm | 1.574803 |
| 50 mm | 1.968504 |
| 75 mm | 2.952756 |
| 100 mm | 3.937008 |
| 250 mm | 9.84252 |
| 500 mm | 19.68504 |
| 1,000 mm | 39.37008 |
How the conversion works
The relationship is in = mm × 0.03937007874. Both units measure length, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.
Common questions
- How many inches are in one millimeter?
- One millimeter equals 0.03937 inches. in = mm × 0.03937007874.
- How do you convert millimeters to inches?
- Use in = mm × 0.03937007874. So 10 mm is 0.3937 in.
- How many millimeters are in one inch?
- One inch equals 25.4 millimeters, which is the reverse of the conversion above.
Related pages
Sources
- Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
- Calculated on this page — At One Place