How do you convert acres to hectares?
Multiply by 0.4047, or remember that an acre is roughly 40% of a hectare. Concrete anchor: a football pitch (about 0.7 ha) is 1.75 acres, and a hectare is a square 100 meters on each side.
acres = hectares × 2.471
Common land sizes
| 0.25 acre (US lot) | 0.10 ha |
| 1 acre | 0.40 ha |
| 2.47 acres | 1 ha |
| 5 acres | 2.02 ha |
| 10 acres | 4.05 ha |
| 20 acres | 8.09 ha |
| 50 acres | 20.23 ha |
| 100 acres (farm) | 40.47 ha |
| 109 acres (Vatican City) | 44.11 ha |
| 640 acres (1 sq mile) | 259 ha |
| 843 acres (Central Park) | 341.15 ha |
1 international acre = 4,046.8564224 m² exactly, derived from the 1959 yard. The hectare is 10,000 m², a square 100 m on each side. Methodology & sources.
Frequently asked questions
How many hectares is 1 acre?
1 acre equals 0.4047 hectare, or 4,047 m². To picture it: roughly a football pitch with its top half removed, or a square about 64 meters on each side.
Where does the acre come from?
The medieval acre was the area a team of oxen could plough in one day: a strip one furlong long (201 m) and one chain wide (20.1 m). It remains the standard land unit in the United States and the United Kingdom.
Why do 640 acres make exactly 1 square mile?
The American Public Land Survey System divides territory into one-square-mile sections of 640 acres, themselves split into 160-acre quarter sections: the historic size of Homestead Act claims.
Is a dunam the same everywhere?
No, and it is the most misleading land unit there is. The Ottoman dönüm was about 919 m². The countries that metricated it, Turkey, Israel, Lebanon, Syria and Jordan, rounded it to exactly 1,000 m², a tenth of a hectare. Iraq, meanwhile, uses a dunam of 2,500 m². A plot advertised at 10 dunams is therefore 1 hectare in Ankara and 2.5 in Baghdad.
Is the Egyptian feddan an acre?
Almost, which is precisely the trouble. The feddan is 4,200.83 m² against 4,046.86 for the international acre, 3.8 % more. Over a hundred feddans the gap reaches a hectare and a half. Egypt kept it after metrication, and it divides into 24 qirats of 175 m².