Millimetres to kilometres converter
Kilometres (km)
1 millimetre = 0.000001 kilometres
How to convert millimetres to kilometres
km = mm × 0.000001
Multiply the number of millimetres by 0.000001 to get kilometres. Going the other way, divide by 0.000001 (or multiply by 1000000).
One millimetre is exactly defined as 0.000001 kilometres (to 12 significant figures), and one kilometre is 1000000 millimetres.
Worked examples
- Convert 5 millimetres: 5 × 0.000001 = 0.000005 0.000005 kilometres.
- Convert 12.5 millimetres: 12.5 × 0.000001 = 0.0000125 0.0000125 kilometres.
- Convert 250 millimetres: 250 × 0.000001 = 0.00025 0.00025 kilometres.
Quick-reference table
| mm | km |
|---|---|
| 1 | 0.000001 |
| 2 | 0.000002 |
| 3 | 0.000003 |
| 5 | 0.000005 |
| 10 | 0.00001 |
| 15 | 0.000015 |
| 20 | 0.00002 |
| 25 | 0.000025 |
| 50 | 0.00005 |
| 75 | 0.000075 |
| 100 | 0.0001 |
| 1,000 | 0.001 |
| km | mm |
|---|---|
| 1 | 1,000,000 |
| 2 | 2,000,000 |
| 3 | 3,000,000 |
| 5 | 5,000,000 |
| 10 | 10,000,000 |
| 15 | 15,000,000 |
| 20 | 20,000,000 |
| 25 | 25,000,000 |
| 50 | 50,000,000 |
| 75 | 75,000,000 |
| 100 | 100,000,000 |
| 1,000 | 1,000,000,000 |
Related conversions
Frequently asked questions
How many kilometres are in 1 millimetre?
1 millimetre equals 0.000001 kilometres.
What is the formula to convert millimetres to kilometres?
Use km = mm × 0.000001. Multiply the number of millimetres by 0.000001 to get kilometres. Going the other way, divide by 0.000001 (or multiply by 1000000).
What is 100 millimetres in kilometres?
100 millimetres is 0.0001 kilometres.