Metres to Kilometres Converter
Convert metres to kilometres — divide by 1,000, the step behind every running distance and road sign. Results update as you type; exact factors shown.
One metre is 0.001 kilometres — see the exact factor, not a rounded rule of thumb.
How the metres to kilometres converter works
Every length is converted through the metre, the SI base unit of length. The inch has been defined as exactly 25.4 mm since the 1959 international yard and pound agreement, so a foot is exactly 0.3048 m, a yard 0.9144 m and a statute mile 1,609.344 m. The nautical mile is 1,852 m by international definition.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common length conversions
| From | To | Units |
|---|---|---|
| 100 m | 0.1 km | metres to kilometres |
| 200 m | 0.2 km | metres to kilometres |
| 400 m | 0.4 km | metres to kilometres |
| 800 m | 0.8 km | metres to kilometres |
| 1,000 m | 1 km | metres to kilometres |
| 1,500 m | 1.5 km | metres to kilometres |
| 3,000 m | 3 km | metres to kilometres |
| 5,000 m | 5 km | metres to kilometres |
| 10,000 m | 10 km | metres to kilometres |
| 21,097.5 m | 21.0975 km | metres to kilometres |
| 42,195 m | 42.195 km | metres to kilometres |
| 100,000 m | 100 km | metres to kilometres |
Units in this converter and their exact factors
| Unit | Symbol | One unit in metres |
|---|---|---|
| millimetre | mm | 0.001 metre |
| centimetre | cm | 0.01 metre |
| metre | m | 1 metre |
| kilometre | km | 1,000 metre |
| inch | in | 0.0254 metre |
| foot | ft | 0.3048 metre |
| yard | yd | 0.9144 metre |
| mile | mi | 1,609.344 metre |
| nautical mile | nmi | 1,852 metre |
FAQFrequently asked questions about length conversion
How many metres in a kilometre?
Exactly 1,000.
What is 5000 m in km?
5 km — the standard track and parkrun distance.
What is a half marathon in km?
21.0975 km, which is 21,097.5 m.
How do I convert m to km quickly?
Move the decimal point three places left: 400 m is 0.4 km.
Is 10,000 m the same as 10 km?
Yes — the track event and the road distance are the same length, though track times are usually faster.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.