Convert millimeters to kilometers
1 mm = 0.000001 km — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.000 001km
Exact decimal: 0.000001
As a fraction: 1/1000000
1 mm = 0.000001 km
How to convert millimeters to kilometers
Multiply the number of millimeters by 0.000001 to get kilometers.
The exact factor is 0.000001 — as a fraction, 1/1000000.
Millimeter to Kilometer conversion table
| Millimeters (mm) | Kilometers (km) |
|---|---|
| 1 mm | 0.000 001 |
| 2 mm | 0.000 002 |
| 3 mm | 0.000 003 |
| 5 mm | 0.000 005 |
| 10 mm | 0.000 01 |
| 20 mm | 0.000 02 |
| 25 mm | 0.000 025 |
| 50 mm | 0.000 05 |
| 100 mm | 0.0001 |
| 250 mm | 0.000 25 |
| 500 mm | 0.0005 |
| 1000 mm | 0.001 |
Kilometer to Millimeter conversion table
| Kilometers (km) | Millimeters (mm) |
|---|---|
| 1 km | 1 000 000 |
| 2 km | 2 000 000 |
| 3 km | 3 000 000 |
| 5 km | 5 000 000 |
| 10 km | 10 000 000 |
| 20 km | 20 000 000 |
| 25 km | 25 000 000 |
| 50 km | 50 000 000 |
| 100 km | 100 000 000 |
| 250 km | 250 000 000 |
| 500 km | 500 000 000 |
| 1000 km | 1 000 000 000 |
Frequently asked
How many kilometers are in a millimeter?
One millimeter equals 0.000001 kilometers (mm → km). That figure is exact, not rounded.
How do you convert millimeters to kilometers?
Multiply the number of millimeters by 0.000001 to get kilometers.
What is 1 km in millimeters?
One kilometer is 1000000 millimeters.
What is 10 mm in km?
10 mm = 0.000 01 km.