Meters to KM Converter
Meters to kilometers, or metres to kilometres, is one division: km = m / 1,000. A kilometre is exactly 1,000 metres, because kilo is the SI prefix for a thousand, so 500 m is 0.5 km, 1,500 m is 1.5 km and 42,195 m is 42.195 km. Mathematically, the decimal point moves three places; the displayed answer may round longer inputs to twelve significant digits. The converter above opens with Meter in the From box and Kilometer in the To box whatever you converted last, prints the answer to twelve significant digits as you type, and lists the same distance in millimetres, centimetres, inches, feet, yards, miles and nautical miles underneath. The Swap units button between the two boxes turns the page into a kilometres to metres converter, where the division becomes a multiplication by 1,000.
- Category
- Length
- Base unit
- meter
- Uncommon units
Feet, yards and miles use international definitions. A light year uses a 365.25-day Julian year; the parsec coefficient is approximate.
Results round to 12 significant digits using the listed unit definitions. Input must have a finite numeric magnitude and at most 512 significant digits. Type a single decimal or scientific number; a matching From unit suffix is accepted. Commas and grouped spaces separate thousands; decimal commas, fractions and compound measurements are refused.
1 m in every length unit
Selectable complete conversion
Metres to kilometres at the distances people look up
All kilometer cells here are exact decimal shifts of their original meter values and fit the display precision. Longer inputs can still need twelve-significant-digit display rounding. The descriptive labels illustrate supplied nominal distances; conversion does not measure or certify a pool, course or track.
| Metres | Kilometres | What it is |
|---|---|---|
| 1 m | 0.001 | A thousandth of a kilometre |
| 10 m | 0.01 | A hundredth of a kilometre |
| 50 m | 0.05 | A supplied 50 m pool length |
| 100 m | 0.1 | A supplied 100 m sprint distance |
| 200 m | 0.2 | Half of a supplied 400 m lap |
| 400 m | 0.4 | A supplied 400 m track lap |
| 500 m | 0.5 | Half a kilometre |
| 800 m | 0.8 | Two supplied 400 m laps |
| 1,000 m | 1 | One kilometre, by definition |
| 1,500 m | 1.5 | The metric mile |
| 1,609.344 m | 1.609344 | One international statute mile, exactly |
| 2,000 m | 2 | A supplied 2,000 m rowing distance |
| 3,000 m | 3 | A supplied 3,000 m steeplechase distance |
| 5,000 m | 5 | A 5K |
| 10,000 m | 10 | A 10K |
| 21,097.5 m | 21.0975 | A half marathon |
| 42,195 m | 42.195 | A marathon |
| 100,000 m | 100 | One hundred kilometres |
Common questions
- How do you convert meters to km?
- Divide by 1,000. That is the whole conversion: 500 m is 0.5 km, 750 m is 0.75 km and 5,000 m is 5 km. The digits stay put and the decimal point moves three places to the left. Going the other way, multiply kilometres by 1,000, so 2.4 km is 2,400 m. The Swap units button between the two boxes reverses the pair without reloading the page. The arithmetic is exact for a finite decimal input; displayed outputs still round beyond twelve significant digits. Swap units retains the typed scalar.
- How many meters are in a kilometer?
- Exactly 1,000. Kilo is the SI prefix for a thousand, so this is a definition rather than a measurement: there is no approximation inside it and no country where it differs. That is why 1,000 m comes back from the converter as 1 and 5,000 m as 5, with nothing trailing after the decimal point.
- What is 100 m in km?
- 0.1 km. The short distances people look up all land on clean decimals for the same reason: 50 m is 0.05 km, 200 m is 0.2 km, a supplied 400 m is 0.4 km, and 800 m is 0.8 km. The table below the converter runs from 1 m to 100,000 m and names illustrative stated distances.
- How many meters is a 5K, and how long is a marathon in km?
- A 5K is 5,000 m and a 10K is 10,000 m, since both are named for their kilometres. A marathon is 42,195 m, which the converter reads as 42.195 km, and a half marathon is 21,097.5 m, or 21.0975 km. A mile is 1,609.344 m by definition, so it comes out as 1.609344 km.
- Can I convert kilometers back to meters on this page?
- Yes. Press Swap units and the pair reverses: type 1 and the answer is 1,000 m, and 0.4 km reads as 400 m. Both unit menus stay open as well, so the same number will go from metres to feet, miles, nautical miles or millimetres without leaving the page.
- Why does this page open on metres and kilometres when I last converted something else?
- This focused page opens on Meter and Kilometer, while preserving the main converter’s saved unit pair. When storage is usable, a saved value and uncommon-unit preference can travel between pages. Its suffix must still match From. Valid deliberate scalar edits can save those fields after a short delay; invalid or incomplete drafts preserve the saved record. Unusable or conflicting records remain until you use Forget saved settings, which keeps the current conversion on screen.
- Are metre and kilometre the same as meter and kilometer?
- Yes. These are alternative spellings of the same SI units with symbols m and km. This converter’s menus display Meter and Kilometer. Kilo means exactly 1,000, so the arithmetic is identical.
- How precise is the answer, and can I copy it?
- Decimal-rational arithmetic divides the written input by exactly 1,000 and rounds the output beyond twelve significant digits. It is an exact power-of-ten factor rather than a floating-point residue correction. One meter separately displays as 0.000621371192237 international miles. Magnitudes below 0.000001 km use exponential notation: 0.0001 m gives 1e-7 km and 0.001 m exactly 0.000001 km. Copy result copies the displayed headline without digit-grouping commas; each visible conversion row has its own Copy button. Displayed and copied values round to twelve significant digits. If native copying fails, a complete selectable summary identifies the input, selected pair and conventions and includes every unit in the category, including uncommon units. Your input and converted values are calculated in the browser and are not uploaded by the converter. The definitions arrive with the page, so conversion needs no external data lookup and keeps working offline after the page has loaded. The core conversion needs no account.
Results round to 12 significant digits using the listed unit conventions. Many factors are exact definitions; psi and parsec use rounded coefficients. Temperature includes scale offsets. Days and weeks are fixed-duration units, and unit conversion does not determine calendar dates, ambient pressure or a software label’s convention.