Square Kilometers to Square Meters (km² to m²)
1 square kilometer equals 1,000,000 square meters — multiply the number of square kilometers by 1,000,000 to convert. This is an exact conversion, so 5 km² is 5,000,000 m² and 10 km² is 10,000,000 m².
The formula
To convert square kilometers to square meters, multiply by one million:
square meters = square kilometers × 1,000,000
For example, 2.5 km² × 1,000,000 = 2,500,000 m². Because a kilometer is 1,000 meters, a square kilometer is 1,000 × 1,000 = 1,000,000 m². To reverse it, divide by 1,000,000.
Conversion table
| Square kilometers (km²) | Square meters (m²) |
|---|---|
| 1 | 1,000,000 |
| 2 | 2,000,000 |
| 5 | 5,000,000 |
| 10 | 10,000,000 |
| 25 | 25,000,000 |
| 50 | 50,000,000 |
| 100 | 100,000,000 |
| 500 | 500,000,000 |
| 1000 | 1,000,000,000 |
How to convert online
Live and instant:
- Type the number of square kilometers into the first box.
- Read the square-meter value instantly in the second box.
- Or enter a square-meter value to convert back — it works both ways.
Use the Square Kilometer to Square Meter Converter — free and instant in your browser.
Where this conversion is used
Both units are metric, so this is a pure scale change used constantly in mapping, urban planning, land surveying and GIS work. Regional areas are reported in km², but site-level calculations, zoning and density figures often need square meters.
FAQ
How many square meters are in a square kilometer?
One square kilometer equals exactly 1,000,000 square meters. Multiply km² by 1,000,000 — 10 km² = 10,000,000 m².
What is the formula to convert square kilometers to square meters?
Square meters = km² × 1,000,000. The converter applies this exact factor automatically.
How do I convert square meters back to square kilometers?
Divide by 1,000,000, or multiply by 1.000000e-6. So 5,000,000 m² = 5 km².
Is the conversion exact?
Yes — 1,000,000 is a definitional factor, so there is no rounding error.
Related converters
- Square Meter to Square Kilometer Converter
- Square Kilometer to Square Foot Converter
- Square Kilometer to Hectare Converter
- Square Kilometer to Acre Converter
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