Acre (ac)
The acre is a unit of area, used for real estate listings, farming, and land use planning in the US and UK. Its symbol is ac.
ac
ft2
1 acre equals
| Square Feet | 43,560 ft2 |
| Square Meters | 4,046.86 m2 |
| Hectares | 0.404686 ha |
About the acre
The acre originated in medieval England as the amount of land a yoke of oxen could plow in a day. It was standardized at 4,840 square yards.
In everyday use the acre appears in real estate listings, farming, and land use planning in the US and UK. As a point of reference: the White House grounds cover about 18 acres.