Acres to square feet
Multiply acres by 43,560 to get square feet.
2 ac = 87,120 ft²
How to convert acres to square feet
The square foot is exactly 0.09290304 m² (0.3048 m squared), by the 1959 agreement. The acre is exactly 43 560 square feet (4046.8564224 m²).
Worked example — 2 ac: 2 × 43,560 = 87,120 ft².
Acres to square feet table
| Acres | Square feet |
|---|---|
| 0.1 ac | 4,356 ft² |
| 0.25 ac | 10,890 ft² |
| 0.5 ac | 21,780 ft² |
| 1 ac | 43,560 ft² |
| 2 ac | 87,120 ft² |
| 5 ac | 217,800 ft² |
| 10 ac | 435,600 ft² |
| 20 ac | 871,200 ft² |
| 40 ac | 1,742,400 ft² |
Reverse and related
About acres and square feet
Acre (ac)
1 ac = 43,560 ft²Definition. Exactly 43 560 square feet (4046.8564224 m²)
History and origin
The acre began as the area a yoke of oxen could plough in a day, later fixed as 43 560 square feet, or one furlong by one chain. It equals about 4047 square metres.
Current use
Acres are the customary measure for land, farm plots and larger properties in the United States and United Kingdom.
Source: NIST Handbook 44, Appendix C (area); 1959 yard-and-pound agreement
Square foot (ft²)
1 ft² = 0.0000229568 acDefinition. Exactly 0.09290304 m² (0.3048 m squared), by the 1959 agreement
History and origin
The square foot is the area of a square one foot on each side, tied to the international foot fixed in 1959. It equals exactly 0.09290304 square metres.
Current use
Square feet are the standard measure for real estate, flooring and carpet in the United States.
Source: NIST Handbook 44, Appendix C (area); 1959 yard-and-pound agreement
Where people use this
Acres: land and farm plots, US real estate. Square feet: US real estate, flooring and carpet. 1 acre is exactly 43 560 sq ft.
Every value is carried to full double precision; the display is rounded.
Both units are defined in NIST Handbook 44, Appendix C (area); 1959 yard-and-pound agreement.
Questions people ask
How many square feet in an acre?
One acre is exactly 43,560 square feet.
How many sq ft is half an acre?
Half an acre is 21,780 sq ft.
How big is a quarter-acre lot?
A quarter acre is 10,890 sq ft.