Convert millimeter to kilometer
1 mm = 0.000001 km
1 mm = 0.000001 km
1 mm in every length unit
| Planck length | 6.1871e+31 lP |
| femtometer | 1,000,000,000,000 fm |
| picometer | 1,000,000,000 pm |
| bohr radius | 18,897,000 a0 |
| angstrom | 10,000,000 Å |
| nanometer | 1,000,000 nm |
| micrometer | 1,000 μm |
| thou | 39.37 thou |
| point | 2.8346 pt |
| millimeter | 1 mm |
| pica | 0.23622 pc |
| centimeter | 0.1 cm |
| inch | 0.03937 in |
| decimeter | 0.01 dm |
| hand | 0.0098425 hh |
| link | 0.004971 li |
| foot | 0.0032808 ft |
| US survey foot | 0.0032808 ftUS |
| yard | 0.0010936 yd |
| meter | 0.001 m |
| fathom | 0.00054681 ftm |
| rod | 0.00019884 rd |
| chain | 0.00004971 ch |
| cable length | 0.0000053996 cb |
| furlong | 0.000004971 fur |
| kilometer | 0.000001 km |
| mile | 6.2137e-07 mi |
| nautical mile | 5.3996e-07 nmi |
| league | 2.0712e-07 lea |
| megameter | 1.0000e-09 Mm |
| Earth radius | 1.5696e-10 REarth |
| light-second | 3.3356e-12 ls |
| lunar distance | 2.6015e-12 LD |
| solar radius | 1.4374e-12 Rsun |
| light-minute | 5.5594e-14 lmin |
| astronomical unit | 6.6846e-15 AU |
| light-year | 1.0570e-19 ly |
| parsec | 3.2408e-20 pc |
| kiloparsec | 3.2408e-23 kpc |
| megaparsec | 3.2408e-26 Mpc |
| gigaparsec | 3.2408e-29 Gpc |
How the conversion works
Multiply by 0.000001 to go from millimeter to kilometer, 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? kilometer to millimeter — 1 km = 1,000,000 mm.
millimeter to kilometer — common values
| 1 mm | 0.000001 km |
| 2 mm | 0.000002 km |
| 3 mm | 0.000003 km |
| 5 mm | 0.000005 km |
| 10 mm | 0.00001 km |
| 15 mm | 0.000015 km |
| 20 mm | 0.00002 km |
| 25 mm | 0.000025 km |
| 50 mm | 0.00005 km |
| 75 mm | 0.000075 km |
| 100 mm | 0.0001 km |
| 250 mm | 0.00025 km |
| 500 mm | 0.0005 km |
| 1000 mm | 0.001 km |