square metre (m²)
1 square metre = 0.000001 square kilometres
What is square metre?
The square metre is the SI unit of area. It is widely used in real estate, construction, interior design, and land measurement across countries that use the metric system.
Notes: Base unit for area
Real-world uses
Square metres are the global standard for floor space in real estate listings, construction blueprints, and land surveys outside the US. Solar panel output is rated per square metre, and rental prices in most countries are quoted per m².
History
The square metre is a derived SI unit that follows naturally from the metre. It became the standard area unit as the metric system spread globally. Real estate markets worldwide adopted it as metrication displaced local units like the tsubo (Japan) and pyeong (Korea).
Common mistakes
Confusing linear metres with square metres—a room that is 3 m × 4 m is 12 m², not 7 m. Also, forgetting that when scaling dimensions by a factor, area scales by the square of that factor.
When is this conversion used?
Converting square metre to square kilometre is useful in the area domain when comparing values across different measurement standards or applying formulas that require a specific unit.
How to convert square metre to square kilometre
To convert square metre to square kilometre, multiply the value by 0.000001.
Conversion formula (from base unit)
x * 1.0
Measurement standards
The square metre is the SI derived unit of area. The hectare (10,000 m²) is accepted for use with the SI by the BIPM, particularly for land measurement, though it is not an SI unit itself.
Did you know?
Vatican City, the world's smallest independent state, covers just 0.44 km² (about 109 acres) — smaller than many golf courses. By contrast, Russia spans over 17.1 million km², nearly 39 million times larger.
| square metres | square kilometres |
|---|---|
| 0.1 | 1.000000e-07 |
| 0.5 | 5.000000e-07 |
| 1 | 0.000001 |
| 2 | 0.000002 |
| 5 | 0.000005 |
| 10 | 0.00001 |
| 25 | 0.000025 |
| 50 | 0.00005 |
| 100 | 0.0001 |
| 250 | 0.00025 |
| 500 | 0.0005 |
| 1,000 | 0.001 |
Common values
| square metres | square kilometres | |
|---|---|---|
| A4 paper | 0.062 square metres | 6.200000e-08 square kilometres |
| Parking space | 12.5 square metres | 0.0000125 square kilometres |
| Tennis court | 260.87 square metres | 0.00026087 square kilometres |
| Football field (soccer) | 7,140 square metres | 0.00714 square kilometres |
| Central Park, NYC | 3,410,000 square metres | 3.41 square kilometres |
Full square metre conversion table
| Unit | Value | Factor |
|---|---|---|
| square kilometre | 1 m² = 0.000001 km² | × 0.000001 |
| square foot | 1 m² = 10.76391042 ft² | × 10.76391042 |
| square mile | 1 m² = 3.861022e-07 mi² | × 3.861022e-07 |
| acre | 1 m² = 0.00024711 ac | × 0.00024711 |
| hectare | 1 m² = 0.0001 ha | × 0.0001 |
| square centimetre | 1 m² = 10,000 cm² | × 10,000 |
| square inch | 1 m² = 1,550.00310001 in² | × 1,550.00310001 |
| square yard | 1 m² = 1.19599005 yd² | × 1.19599005 |
| are | 1 m² = 0.01 a | × 0.01 |