Square Meters to Square Kilometers
Convert square meters (m²) to square kilometers (km²). Both measure surface measurement, and the conversion comes up in real estate, farming, construction work.
The Formula
``
square kilometers = square meters × 0.000001
square meters = square kilometers × 1000000
`
One square meter is 1.0000e-6 square kilometers, and one square kilometer is 1,000,000 square meters.
Conversion Table
| Square Meters | Square Kilometers |
|---|---|
| 1 m² | 1.0000e-6 km² |
| 2 m² | 2.0000e-6 km² |
| 5 m² | 5.0000e-6 km² |
| 10 m² | 1.0000e-5 km² |
| 25 m² | 2.5000e-5 km² |
| 50 m² | 5.0000e-5 km² |
| 100 m² | 1.0000e-4 km² |
| 500 m² | 5.0000e-4 km² |
| 1,000 m² | 0.001 km² |
The Other Direction
| Square Kilometers | Square Meters |
|---|---|
| 1 km² | 1,000,000 m² |
| 2 km² | 2,000,000 m² |
| 5 km² | 5,000,000 m² |
| 10 km² | 10,000,000 m² |
| 25 km² | 25,000,000 m² |
| 50 km² | 50,000,000 m² |
| 100 km² | 100,000,000 m² |
| 500 km² | 500,000,000 m² |
| 1,000 km² | 1,000,000,000 m² |
What Each Unit Is
Square Meters (m²) — the area of a square one metre on each side — the SI derived unit of area. The metric standard for floor area, land and materials.
Square Kilometers (km²) — one million square metres. The metric unit for regions, cities and land cover.
A Sense of Scale
A parking space is about 12 m²- A small flat is 45 m²
- A tennis court is 261 m²
- Central Park is 3.4 km²
- Manhattan is 59 km²
- Greater London is 1,572 km²
Precision
The factor 0.000001 is exact by international agreement, not a rounded approximation. Any imprecision in a result comes from your input, not the conversion.
In Code
`javascript
const squareMeterToSquareKilometer = (value) => value * 0.000001;
``
Where This Conversion Comes Up
- Real estate
- Farming
- Construction
- Landscaping
- Flooring
How Many Decimals Do You Need?
Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 m² with the factor truncated at each decimal place:
| Decimals kept | Factor | 137 m² becomes | Error |
|---|---|---|---|
| 0 | 0 | 0 | 100.0000% |
| 1 | 0 | 0 | 100.0000% |
| 2 | 0 | 0 | 100.0000% |
| 3 | 0 | 0 | 100.0000% |
| 4 | 0 | 0 | 100.0000% |
The right number of significant figures is set by your input, not by the converter. If you measured square meters to three significant figures, the answer in square kilometers is only good to three — writing more digits claims precision the measurement never had.