Square Kilometers to Square Meters
Convert square kilometers to square meters instantly — one square kilometer is 1e+06 square meters.
| Square Kilometers | Square Meters |
|---|---|
| 1 km² | 1000000 m² |
| 2 km² | 2000000 m² |
| 3 km² | 3000000 m² |
| 5 km² | 5000000 m² |
| 10 km² | 10000000 m² |
| 25 km² | 25000000 m² |
| 50 km² | 50000000 m² |
| 100 km² | 100000000 m² |
How to use
- Enter a value in the Square Kilometers field.
- The Square Meters figure appears immediately — no button to press.
- Typing in the Square Meters field converts back to Square Kilometers the same way.
- Use the reference table for the values that come up most often.
Square Kilometers to Square Meters formula
The factor from square kilometers to square meters is 1000000.
m² = km² × 1000000
Why this factor: the square kilometer and the square meter are both defined against the square meter, so dividing one definition by the other gives 1000000 directly. Both definitions are set out in full below.
To go the other way, divide by 1000000 — or use the Square Meters to Square Kilometers converter, which is the same calculation reversed.
Worked example
Take 1000 km² and multiply by the factor 1000000: the result is 1000000000 m².
1000 km² × 1000000 = 1000000000 m²
The converter above does this for any value you type, in either direction.
What is a square kilometer?
A square kilometer is the area of a one-kilometer square — one million square meters.
Definition: Exactly 1×10⁶ square meters. Note it is the kilometer that is squared, not the prefix applied to a square meter.
Where it is used: City, national park and country areas, population density, and land cover statistics.
What is a square meter?
The square meter is the SI unit of area — the surface of a one-meter square.
Definition: Derived directly from the meter.
Where it is used: Floor area in property listings, land plots, and material coverage worldwide outside the US.
Square Kilometers vs Square Meters
The square kilometer is a metric unit while the square meter is an SI unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many square meters are in a square kilometer?
One square kilometer equals 1000000 square meters.
What is the formula to convert square kilometers to square meters?
Multiply the number of square kilometers by 1000000. To reverse it, divide by 1000000 instead.
How do I convert square meters back to square kilometers?
Divide by 1000000, which is the same as multiplying by 1e-06.
How many square meters are in 10 square kilometers?
10 km² works out to 10000000 m².
How is the square kilometer defined?
Exactly 1×10⁶ square meters. Note it is the kilometer that is squared, not the prefix applied to a square meter.