Millimetres to Kilometres Converter
Convert millimetre to kilometre instantly. Type a value below — the result updates as you type.
When you need to convert millimetre to kilometre
Length conversions come up constantly in DIY, travel and online shopping — sizing furniture, reading a height in a different system, or checking a screen or fabric measurement listed in unfamiliar units.
Typical values: 0.5 mm is about 5e-07 km, and 100 mm works out to roughly 0.0001 km. Because the ratio is fixed at 1e-06, you can scale any amount linearly — doubling the millimetres doubles the kilometres.
Metric and imperial length units coexist worldwide, so the same object is often quoted two ways depending on the country.
How to convert millimetre to kilometre
One millimetre equals 1e-06 kilometres. To convert, multiply the number of millimetres by 1e-06:
kilometres = millimetres × 1e-06
For example, 10 millimetres × 1e-06 = 1e-05 kilometres.
Millimetres to kilometres conversion table
| Length (mm) | Kilometres (km) |
|---|---|
| 1 mm | 1e-06 km |
| 2 mm | 2e-06 km |
| 3 mm | 3e-06 km |
| 5 mm | 5e-06 km |
| 10 mm | 1e-05 km |
| 20 mm | 2e-05 km |
| 50 mm | 5e-05 km |
| 100 mm | 0.0001 km |
FAQ
How many kilometres are in a millimetre?
One millimetre = 1e-06 kilometres.
How do I convert kilometres back to millimetres?
Divide by 1e-06, or use the kilometres to millimetres converter.