Formula
km² to ac conversion formula
Use this relationship for a direct conversion:
ac = km² x 247.105381467165
Worked example
2 km² = 494.2107629343 ac.
Values derived from exact metric and international length definitions.
Area conversion
Convert Square kilometer to Acre
1 square kilometer (km²) equals 247.105381467165 acre (ac). Enter any value below to convert from km² to ac.
Enter a value and choose units. Results update instantly.
1 km² = 247.1053814672 ac
All Area units
From 1 km²| Unit | Value |
|---|---|
| Square meter m² | 1,000,000 |
| Square kilometer km² | 1 |
| Square centimeter cm² | 10,000,000,000 |
| Square millimeter mm² | 1e12 |
| Square inch in² | 1,550,003,100.0062000751 |
| Square foot ft² | 10,763,910.4167097211 |
| Square yard yd² | 1,195,990.0463010804 |
| Square mile mi² | 0.3861021585 |
| Acre ac | 247.1053814672 |
| Hectare ha | 100 |
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Quick reference
Square kilometer to Acre table
| Square kilometer (km²) | Acre (ac) |
|---|---|
| 0.01 | 2.4710538147 |
| 0.1 | 24.7105381467 |
| 1 | 247.1053814672 |
| 2 | 494.2107629343 |
| 5 | 1,235.5269073358 |
| 10 | 2,471.0538146717 |
| 25 | 6,177.6345366791 |
| 50 | 12,355.2690733583 |
| 100 | 24,710.5381467165 |
| 1,000 | 247,105.3814671653 |
From unit
About the square kilometer
One million square meters.
Symbol: km²
To unit
About the acre
Exactly 43,560 square feet.
Symbol: ac
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Related conversions
Source
Conversion standard
Definitions are checked against NIST SP 811: Area units. Calculations use full internal precision before display rounding.
View the complete area converterQuestions
km² to ac FAQ
How do you convert square kilometer to acre?
Use the formula ac = km² x 247.105381467165. 1 square kilometer (km²) equals 247.105381467165 acre (ac).
Is the km² to ac conversion exact?
Both unit definitions use exact factors. Only the displayed decimal may be rounded.