1 ac = 43560 ft² (acre → square foot)
1 ac = 43560 ft²
1 acre equals 43560 square feet. To convert acres to square feet, multiply the acre value by 43560. For quick reference: 1 ac = 43560 ft², 5 ac = 217800 ft², 10 ac = 435600 ft², 100 ac = 4356000 ft².
Square feet = Acres × 43560Acres to square feet multiplies by 43,560 exactly. A 1.5-acre property is 65,340 sq ft; a 40-acre parcel is 1,742,400 sq ft. The conversion turns land-scale units into building-scale ones — useful when computing how much of a lot a proposed structure covers, since zoning coverage limits compare building square footage against lot square footage, and the lot often comes quoted in acres.
Start with your value in acres.
Multiply the acre value by 43560. This is the exact conversion factor from acres to square feet.
The product is your value in square feet. For example, 5 ac × 43560 = 217800 ft².
The exact factor from acres to square feet is 43560.
Square feet = Acres × 43560
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Acres (ac) | Square feet (ft²) |
|---|---|
| 0.1 ac | 4356 ft² |
| 0.25 ac | 10890 ft² |
| 0.5 ac | 21780 ft² |
| 1 ac | 43560 ft² |
| 2 ac | 87120 ft² |
| 3 ac | 130680 ft² |
| 4 ac | 174240 ft² |
| 5 ac | 217800 ft² |
| 6 ac | 261360 ft² |
| 7 ac | 304920 ft² |
| 8 ac | 348480 ft² |
| 9 ac | 392040 ft² |
| 10 ac | 435600 ft² |
| 12 ac | 522720 ft² |
| 15 ac | 653400 ft² |
| 20 ac | 871200 ft² |
| 25 ac | 1089000 ft² |
| 30 ac | 1306800 ft² |
| 40 ac | 1742400 ft² |
| 50 ac | 2178000 ft² |
| 60 ac | 2613600 ft² |
| 70 ac | 3049200 ft² |
| 75 ac | 3267000 ft² |
| 80 ac | 3484800 ft² |
| 90 ac | 3920400 ft² |
| 100 ac | 4356000 ft² |
| 120 ac | 5227200 ft² |
| 150 ac | 6534000 ft² |
| 200 ac | 8712000 ft² |
| 250 ac | 10890000 ft² |
| 300 ac | 13068000 ft² |
| 400 ac | 17424000 ft² |
| 500 ac | 21780000 ft² |
| 600 ac | 26136000 ft² |
| 750 ac | 32670000 ft² |
| 800 ac | 34848000 ft² |
| 1000 ac | 43560000 ft² |
| 1200 ac | 52272000 ft² |
| 1500 ac | 65340000 ft² |
| 2000 ac | 87120000 ft² |
| 2500 ac | 108900000 ft² |
| 3000 ac | 130680000 ft² |
| 4000 ac | 174240000 ft² |
| 5000 ac | 217800000 ft² |
| 7500 ac | 326700000 ft² |
| 10000 ac | 435600000 ft² |
| 20000 ac | 871200000 ft² |
| 50000 ac | 2178000000 ft² |
| 100000 ac | 4356000000 ft² |
| 1000000 ac | 43560000000 ft² |
An American football field (with end zones) is about 1.32 acres. A quarter-acre lot is the classic US suburban plot size. In square feet, that gives you: 1 ac = 43560 ft², 10 ac = 435600 ft², 100 ac = 4356000 ft².
The acre is the traditional imperial unit for land, still the standard for US and UK property, farmland, and parkland. One acre is exactly 4,046.8564224 m² — historically the area a yoke of oxen could plough in a day, standardised as 1 chain by 1 furlong (66 × 660 feet, or 43,560 square feet). An American football field including end zones is about 1.32 acres.
The square foot is the standard area unit for US and Canadian real estate, and remains common in UK property listings alongside square meters. One square foot is exactly 0.09290304 m² (derived from 1 ft = 0.3048 m squared). A typical US single-family home is 1,500–2,500 sq ft; a two-car garage is about 400–600 sq ft.