Convert Square Kilometers to Acres
km² to ac · area conversion
What are square kilometers and acres?
A square kilometer is one million square meters, used for large regions and cities. An acre is 43,560 square feet (about 4,047 m²), the traditional unit for land area. For scale: a tennis court is about 261 m² (2,808 ft²), and a soccer pitch is roughly 0.7 hectares.
How to convert square kilometers to acres
1 km² = 247.105 ac. To convert, multiply the number of square kilometers by 247.105. For example, 5 km² = 1,235.53 ac, and 20 km² = 4,942.11 ac. To go the other way, multiply acres by 0.00404686 (since 1 ac = 0.00404686 km²).
Square Kilometers to Acres conversion table
| Square Kilometers (km²) | Acres (ac) |
|---|---|
| 1 | 247.105 |
| 5 | 1,235.53 |
| 10 | 2,471.05 |
| 25 | 6,177.64 |
| 50 | 12,355.3 |
| 100 | 24,710.5 |
| 1,000 | 247,105 |
FAQ
What is 1 km² in ac?
1 km² = 247.105 ac. To convert any amount, multiply the number of square kilometers by 247.105.
How do I convert acres back to square kilometers?
Go the other way: 1 ac = 0.00404686 km², so multiply acres by 0.00404686 to get square kilometers.
Is a square kilometer bigger than a acre?
Yes — 1 km² is the larger unit, equal to 247.105 ac.
Are these area conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.