How to Convert Metres to Kilometres (m to km)
Length conversions come up when reading overseas furniture specs, cycling the Round Island Route in kilometres while a foreign app shows miles, or checking marine distances in the Singapore Strait in nautical miles. This guide shows how to convert metres into kilometres by hand, with examples and a quick-reference table.
The conversion
To convert metres to kilometres, multiply the value by 0.001. To go the other way, divide by the same number (or multiply by 1,000). For a quick estimate, multiply by about 0.001.
Kilometres = metres × 0.001
Worked examples
- 3 m = 0.003 km
- 12.5 m = 0.0125 km
- 75 m = 0.075 km
Metres to Kilometres table
| Metres | Kilometres |
|---|---|
| 1 m | 0.001 km |
| 2 m | 0.002 km |
| 5 m | 0.005 km |
| 10 m | 0.01 km |
| 20 m | 0.02 km |
| 25 m | 0.025 km |
| 50 m | 0.05 km |
| 100 m | 0.1 km |
| 250 m | 0.25 km |
| 500 m | 0.5 km |
| 1,000 m | 1 km |
Common questions
Is m to km exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Kilometres to Metres converter.
Mistakes to avoid
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Background
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
For any value, use the Metres to Kilometres Converter or browse all length converters.
Run your own numbers: Metres to Kilometres Converter