Convert Square kilometres to Acres
1 square kilometre is 247.11 ac. One square kilometre is exactly 247.105381467 acres.
One square kilometre is 247.10538 acres. To convert square kilometres to acres, multiply by 247.10538; to go the other way, divide by 247.10538 or multiply by 0.0040468564. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Office of Weights and Measures. A million square metres, or 100 hectares.
Factor checked against the defining standard · How we check
- Square kilometres × 247.10538
1 * 247.10538247.105 ac
1 square kilometre in every area unit
| Unit | Value | Exact factor |
|---|---|---|
| square inches | 1,550,003,100 sq in | × 1,550,003,100.01 |
| square feet | 10,763,910.42 sq ft | × 10,763,910.4167 |
| square yards | 1,195,990.046 sq yd | × 1,195,990.0463 |
| acres | 247.1053815 ac | × 247.105381467 |
| square meters | 1,000,000 m² | × 1,000,000 |
| square millimetres | 1,000,000,000,000 mm² | × 1,000,000,000,000 |
| square centimetres | 10,000,000,000 cm² | × 10,000,000,000 |
| square kilometres (as entered) | 1 km² | — |
| square miles | 0.3861021585 mi² | × 0.386102158542 |
| hectares | 100 ha | × 100 |
Factors are entered by hand from NIST Office of Weights and Measures rather than derived from a units library, so the ones that terminate are exact rather than rounded.
The same converter answers this pair however it is written: sqkm to ac is how the symbols are typed on a keyboard with no superscript on it.
How do you convert square kilometres to acres? The converter and the working
- 1.Take the measurement in square kilometres.
- 2.Multiply by 247.10538 — that is how many acres fit in one square kilometre.
- 3.To go back the other way, divide by 247.10538, or multiply by 0.0040468564.
Worked example: 25 square kilometres to acres
- Formula
- km² × 247.10538 = ac
- Arithmetic
- 25 × 247.10538 = 6,177.63 ac
- Answer
- 25 km² = 6,177.63 ac
The factor is rounded for display; the figure above is computed from the full value.
Square kilometres to acres conversion table
| Square kilometres | Acres |
|---|---|
| 1 km² | 247.11 ac |
| 2 km² | 494.21 ac |
| 3 km² | 741.32 ac |
| 4 km² | 988.42 ac |
| 5 km² | 1,235.53 ac |
| 6 km² | 1,482.63 ac |
| 7 km² | 1,729.74 ac |
| 8 km² | 1,976.84 ac |
| 9 km² | 2,223.95 ac |
| 10 km² | 2,471.05 ac |
| 12 km² | 2,965.26 ac |
| 15 km² | 3,706.58 ac |
| 20 km² | 4,942.11 ac |
| 25 km² | 6,177.63 ac |
| 50 km² | 12,355.27 ac |
| 100 km² | 24,710.54 ac |
| 200 km² | 49,421.08 ac |
| 300 km² | 74,131.61 ac |
| 500 km² | 123,552.69 ac |
| 1000 km² | 247,105.38 ac |
| 2000 km² | 494,210.76 ac |
| 5000 km² | 1,235,526.91 ac |
| 10000 km² | 2,471,053.81 ac |
What is a square kilometre?
A million square metres, or 100 hectares. The unit land area and population density are published in everywhere except the US.
What is an acre?
Exactly 43,560 square feet — historically the land one team of oxen could plough in a day.
How many acres are in a square kilometre?
One square kilometre is 247.10538 acres. Going the other way, one acre is 0.0040468564 square kilometres. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every area unit here
The whole group — 10 units with their symbols and the size of each one in square meters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a square kilometre.
Cite this page
- APA
- Rule Calculator. (2026). Convert Square kilometres to acres. Rule Calculator. https://rulecalculators.com/convert/square-kilometer-to-acre
- MLA
- "Convert Square kilometres to acres." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/square-kilometer-to-acre.
- Chicago
- Rule Calculator. "Convert Square kilometres to acres." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/square-kilometer-to-acre.
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Questions people actually ask
- How many acres are in a square kilometre?
- 247.10538. Exactly 43,560 square feet — historically the land one team of oxen could plough in a day.
- How do I convert acres back to square kilometres?
- Divide by 247.10538, or multiply by 0.0040468564 — they are the same operation.
Other area conversions
Acres to square kilometres — the same conversion the other way.