Convert millimeter to inch
1 mm = 0.03937007874 in
sig figs
1 mm = 0.0394 in
1 mm in every length unit
| Planck length | 6.19e+31 lP |
| femtometer | 1,000,000,000,000 fm |
| picometer | 1,000,000,000 pm |
| bohr radius | 18,900,000 a0 |
| angstrom | 10,000,000 Å |
| nanometer | 1,000,000 nm |
| micrometer | 1,000 μm |
| thou | 39.4 thou |
| point | 2.83 pt |
| millimeter | 1 mm |
| pica | 0.236 pc |
| centimeter | 0.1 cm |
| inch | 0.0394 in |
| decimeter | 0.01 dm |
| hand | 0.00984 hh |
| link | 0.00497 li |
| foot | 0.00328 ft |
| US survey foot | 0.00328 ftUS |
| yard | 0.00109 yd |
| meter | 0.001 m |
| fathom | 0.000547 ftm |
| rod | 0.000199 rd |
| chain | 0.0000497 ch |
| cable length | 0.0000054 cb |
| furlong | 0.00000497 fur |
| kilometer | 0.000001 km |
| mile | 6.21e-07 mi |
| nautical mile | 5.40e-07 nmi |
| league | 2.07e-07 lea |
| megameter | 1.00e-09 Mm |
| Earth radius | 1.57e-10 REarth |
| light-second | 3.34e-12 ls |
| lunar distance | 2.60e-12 LD |
| solar radius | 1.44e-12 Rsun |
| light-minute | 5.56e-14 lmin |
| astronomical unit | 6.68e-15 AU |
| light-year | 1.06e-19 ly |
| parsec | 3.24e-20 pc |
| kiloparsec | 3.24e-23 kpc |
| megaparsec | 3.24e-26 Mpc |
| gigaparsec | 3.24e-29 Gpc |
How the conversion works
Multiply by 0.03937007874 to go from millimeter to inch, or divide by it to go back. Every conversion on this site routes through the SI value (m) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? inch to millimeter: 1 in = 25.4 mm.
millimeter to inch: common values
| 1 mm | 0.039370079 in |
| 2 mm | 0.078740157 in |
| 3 mm | 0.11811024 in |
| 5 mm | 0.19685039 in |
| 10 mm | 0.39370079 in |
| 15 mm | 0.59055118 in |
| 20 mm | 0.78740157 in |
| 25 mm | 0.98425197 in |
| 50 mm | 1.9685039 in |
| 75 mm | 2.9527559 in |
| 100 mm | 3.9370079 in |
| 250 mm | 9.8425197 in |
| 500 mm | 19.685039 in |
| 1000 mm | 39.370079 in |