Convert kilometers to millimeters instantly. 5 km = 5,000,000 mm.
1 km = 1,000,000 mm
To convert kilometers to millimeters, use the formula mm = km × 1,000,000. In other words, multiply the number of kilometers by 1,000,000 to get the equivalent in millimeters. For example, 5 km equals 5,000,000 mm.
| KM (km) | MM (mm) |
|---|---|
| 1 km | 1,000,000 mm |
| 2 km | 2,000,000 mm |
| 3 km | 3,000,000 mm |
| 4 km | 4,000,000 mm |
| 5 km | 5,000,000 mm |
| 6 km | 6,000,000 mm |
| 7 km | 7,000,000 mm |
| 8 km | 8,000,000 mm |
| 9 km | 9,000,000 mm |
| 10 km | 10,000,000 mm |
| 15 km | 15,000,000 mm |
| 20 km | 20,000,000 mm |
| 25 km | 25,000,000 mm |
| 30 km | 30,000,000 mm |
| 40 km | 40,000,000 mm |
| 50 km | 50,000,000 mm |
| 75 km | 75,000,000 mm |
| 100 km | 100,000,000 mm |
| 250 km | 250,000,000 mm |
| 500 km | 500,000,000 mm |
| 1,000 km | 1,000,000,000 mm |
The kilometer (km) and the millimeter (mm) are both units of length. This page gives you an instant, exact conversion between them, a reference table for the most common values, and the underlying formula so you can check the maths yourself. All calculations run in your browser — nothing you type is sent anywhere.
Need to go the other way? Use the MM to KM converter. For all units at once, try the full Length Converter.
Use the formula mm = km × 1,000,000. For example, 5 km equals 5,000,000 mm. Just enter your value in the converter above to get an instant result.
1 km = 1,000,000 mm. You can multiply any number of kilometers by this figure to convert it, or use the calculator above for exact results.
Use the reverse conversion: 1 mm = 0.000001 km. Our MM to KM converter does this for you.