1 mm = 1.0000 × 10^−6 km
1 millimeter equals 1.0000 × 10^−6 kilometers. To convert millimeters to kilometers, multiply the millimeter value by 1.0000 × 10^−6. For quick reference: 1 mm = 1.0000 × 10^−6 km, 5 mm = 5.0000 × 10^−6 km, 10 mm = 1.0000 × 10^−5 km, 100 mm = 0.0001 km.
Kilometers = Millimeters × 1.0000 × 10^−6Start with your value in millimeters.
Multiply the millimeter value by 1.0000 × 10^−6. This is the exact conversion factor from millimeters to kilometers.
The product is your value in kilometers. For example, 5 mm × 1.0000 × 10^−6 = 5.0000 × 10^−6 km.
The exact factor from millimeters to kilometers is 1.0000 × 10^−6.
Kilometers = Millimeters × 1.0000 × 10^−6
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Millimeters (mm) | Kilometers (km) |
|---|---|
| 0.1 mm | 1.0000 × 10^−7 km |
| 0.25 mm | 2.5000 × 10^−7 km |
| 0.5 mm | 5.0000 × 10^−7 km |
| 1 mm | 1.0000 × 10^−6 km |
| 2 mm | 2.0000 × 10^−6 km |
| 3 mm | 3.0000 × 10^−6 km |
| 4 mm | 4.0000 × 10^−6 km |
| 5 mm | 5.0000 × 10^−6 km |
| 6 mm | 6.0000 × 10^−6 km |
| 7 mm | 7.0000 × 10^−6 km |
| 8 mm | 8.0000 × 10^−6 km |
| 9 mm | 9.0000 × 10^−6 km |
| 10 mm | 1.0000 × 10^−5 km |
| 11 mm | 1.1000 × 10^−5 km |
| 12 mm | 1.2000 × 10^−5 km |
| 13 mm | 1.3000 × 10^−5 km |
| 14 mm | 1.4000 × 10^−5 km |
| 15 mm | 1.5000 × 10^−5 km |
| 16 mm | 1.6000 × 10^−5 km |
| 18 mm | 1.8000 × 10^−5 km |
| 20 mm | 2.0000 × 10^−5 km |
| 22 mm | 2.2000 × 10^−5 km |
| 24 mm | 2.4000 × 10^−5 km |
| 25 mm | 2.5000 × 10^−5 km |
| 28 mm | 2.8000 × 10^−5 km |
| 30 mm | 3.0000 × 10^−5 km |
| 32 mm | 3.2000 × 10^−5 km |
| 36 mm | 3.6000 × 10^−5 km |
| 40 mm | 4.0000 × 10^−5 km |
| 45 mm | 4.5000 × 10^−5 km |
| 48 mm | 4.8000 × 10^−5 km |
| 50 mm | 5.0000 × 10^−5 km |
| 60 mm | 6.0000 × 10^−5 km |
| 70 mm | 7.0000 × 10^−5 km |
| 75 mm | 7.5000 × 10^−5 km |
| 80 mm | 8.0000 × 10^−5 km |
| 90 mm | 9.0000 × 10^−5 km |
| 100 mm | 0.0001 km |
| 125 mm | 0.000125 km |
| 150 mm | 0.00015 km |
| 200 mm | 0.0002 km |
| 250 mm | 0.00025 km |
| 300 mm | 0.0003 km |
| 400 mm | 0.0004 km |
| 500 mm | 0.0005 km |
| 600 mm | 0.0006 km |
| 750 mm | 0.00075 km |
| 800 mm | 0.0008 km |
| 900 mm | 0.0009 km |
| 1000 mm | 0.001 km |
A credit card is about 0.76 mm thick. Standard A4 paper is 0.1 mm thick. A pencil lead is around 2 mm in diameter.
The millimeter (mm) is a metric unit of length equal to one-thousandth of a meter. It is the working unit of engineering drawings, precision manufacturing, electronics, and most consumer-goods specifications outside the United States. A credit card is about 0.76 mm thick; the diameter of a pencil lead is around 2 mm.
The kilometer (km) equals exactly 1,000 meters. It is the standard unit for road distances in almost every country except the United States and the United Kingdom. A 5K running race is 5 kilometers; a marathon is 42.195 km.