Convert Square Kilometers to Acres
One square kilometer equals 247.1054 acres. Type any value to convert square kilometers to acres instantly — with a full reference table below.
Convert Square Kilometers to Acres
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How to convert Square Kilometers to Acres
To convert square kilometers to acres, multiply by 247.1054. One square kilometer equals 247.1054 ac, and one acre equals 0.00404686 km².
- Take the value in square kilometers — for example 7.5 km².
- Multiply by 247.1054 (the number of acres in one square kilometer).
- 7.5 × 247.1054 = 1,853.29 ac.
Quick mental estimate: Multiply the number of square kilometers by 247 (accurate to better than 0.05%).
Square Kilometers to Acres conversion table
| Square Kilometers | Acres |
|---|---|
| 1 km² | 247.1054 ac |
| 2 km² | 494.2108 ac |
| 3 km² | 741.3161 ac |
| 5 km² | 1,235.527 ac |
| 10 km² | 2,471.054 ac |
| 20 km² | 4,942.108 ac |
| 50 km² | 12,355.27 ac |
| 100 km² | 24,710.54 ac |
| 200 km² | 49,421.08 ac |
| 500 km² | 123,552.7 ac |
| 1,000 km² | 247,105.4 ac |
| 5,000 km² | 1,235,527 ac |
| Acres | Square Kilometers |
|---|---|
| 1 ac | 0.00404686 km² |
| 2 ac | 0.00809371 km² |
| 3 ac | 0.0121406 km² |
| 5 ac | 0.0202343 km² |
| 10 ac | 0.0404686 km² |
| 20 ac | 0.0809371 km² |
| 50 ac | 0.202343 km² |
| 100 ac | 0.404686 km² |
| 200 ac | 0.809371 km² |
| 500 ac | 2.023428 km² |
| 1,000 ac | 4.046856 km² |
| 5,000 ac | 20.23428 km² |
About converting Square Kilometers to Acres
Square Kilometers (km²) and Acres (ac) are both units of area. The exact factor is 1 km² = 247.1054 ac, so multiply by 247.1054 to go from square kilometers to acres (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Acres to Square Kilometers converter, or the full unit converter for every unit at once.
Real-world area in square kilometers and acres
| Example | Square Kilometers | Acres |
|---|---|---|
| A doubles tennis court (23.77 × 10.97 m) | 0.000260757 km² | 0.0644344 ac |
| An NBA basketball court (94 × 50 ft) | 0.000436644 km² | 0.107897 ac |
| An American football field (incl. end zones) | 0.00535122 km² | 1.322314 ac |
| A football pitch (105 × 68 m) | 0.00714 km² | 1.764332 ac |
| One acre | 0.00404686 km² | 1 ac |
“≈” marks typical values; the rest are defined or measured figures.
The units
A square 1 km on each side — 1,000,000 m² or 100 hectares.
Used for: City, country and land areas.
43,560 square feet, exactly 4,046.8564224 m².
Used for: Farmland and property in the US, UK, India and Australia.
Area factors are the squares of exact length factors, so they are exact too (an international acre is exactly 4,046.8564224 m²).