Area / m² → km²
Convert Square meters to Square kilometers
Convert surface areas in metric and international customary units. Convert Square meters (m²) to Square kilometers (km²). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Square kilometers to Square meters →
How to convert square meters to square kilometers
Area factors are squared length factors. Acres here use international feet, not historical US survey feet.
Use x for the value in m², b for the intermediate value in m², and y for the result in km².
km² = m² ÷ 1000000
Worked examples
10 m² ≈ 0.00001 km²
Step 1: (10 × 1) ≈ 10 m².
Step 2: 10 ÷ 1000000 ≈ 0.00001 km².20 m² ≈ 0.00002 km²
Step 1: (20 × 1) ≈ 20 m².
Step 2: 20 ÷ 1000000 ≈ 0.00002 km².
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Square meters
Square meters (m²) measures area under the conventions above. The base value in m² is (x × 1), where x is the numerical value in m². Factors shown here are rounded for display; calculations use the stored factor.
About Square kilometers
Square kilometers (km²) measures area under the conventions above. The base value in m² is (x × 1000000), where x is the numerical value in km². Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Keep these unit conventions consistent when using measurements in construction calculations.
Square meters to square kilometers reference table
| Square meters (m²) | Square kilometers (km²) |
|---|---|
| 1 | 0.000001 |
| 5 | 0.000005 |
| 10 | 0.00001 |
| 25 | 0.000025 |
| 50 | 0.00005 |
| 100 | 0.0001 |
| 1000 | 0.001 |
Browse every area conversion →