Square Kilometers to Square Meters
Convert square kilometers (km²) to square meters (m²). Both measure surface measurement, and the conversion comes up in real estate, farming, construction work.
The Formula
``
square meters = square kilometers × 1000000
square kilometers = square meters × 0.000001
`
One square kilometer is 1,000,000 square meters, and one square meter is 1.0000e-6 square kilometers.
Conversion Table
| 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 |
The Other Direction
| 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 |
What Each Unit Is
Square Kilometers (km²) — one million square metres. The metric unit for regions, cities and land cover.
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.
A Sense of Scale
Central Park is 3.4 km²- Manhattan is 59 km²
- Greater London is 1,572 km²
- A parking space is about 12 m²
- A small flat is 45 m²
- A tennis court is 261 m²
Precision
The factor 1000000 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 squareKilometerToSquareMeter = (value) => value * 1000000;
``
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 km² with the factor truncated at each decimal place:
| Decimals kept | Factor | 137 km² becomes | Error |
|---|---|---|---|
| 0 | 1000000 | 137,000,000 | — |
| 1 | 1000000 | 137,000,000 | — |
| 2 | 1000000 | 137,000,000 | — |
| 3 | 1000000 | 137,000,000 | — |
| 4 | 1000000 | 137,000,000 | — |
The right number of significant figures is set by your input, not by the converter. If you measured square kilometers to three significant figures, the answer in square meters is only good to three — writing more digits claims precision the measurement never had.