Acres to square feet: in short
Multiply the acres by 43,560 to get square feet. One acre is 43,560 sq ft (4,047 m²), a square of about 208′ 8½″ (63.615 m) on each side. Half an acre is 21,780 sq ft.
The formula
Square feet = acres × 43,560. The number is exact: an acre is defined as 43,560 square feet. The way back is acres = square feet ÷ 43,560.
An acre has no fixed shape. It can be long and narrow or square; only the area is fixed.
Common sizes
| Acres | Square feet | Square meters | Side of a square |
|---|---|---|---|
| 0.1 | 4,356 sq ft | 405 m² | 66′ (20.117 m) |
| 0.25 | 10,890 sq ft | 1,012 m² | 104′ 4¼″ (31.808 m) |
| 0.5 | 21,780 sq ft | 2,023 m² | 147′ 7″ (44.983 m) |
| 0.75 | 32,670 sq ft | 3,035 m² | 180′ 9″ (55.092 m) |
| 1 | 43,560 sq ft | 4,047 m² | 208′ 8½″ (63.615 m) |
| 1.5 | 65,340 sq ft | 6,070 m² | 255′ 7⅜″ (77.912 m) |
| 2 | 87,120 sq ft | 8,094 m² | 295′ 1⅞″ (89.965 m) |
| 2.5 | 108,900 sq ft | 10,117 m² | 330′ (100.584 m) |
| 5 | 217,800 sq ft | 20,234 m² | 466′ 8¼″ (142.247 m) |
| 10 | 435,600 sq ft | 40,469 m² | 660′ (201.168 m) |
How big is 1 acre?
An American football field with both end zones (360 × 160 ft) is 57,600 sq ft, so an acre is about 0.8 of a field. Without the end zones (300 × 160 ft) an acre is about 0.9 fields.
An acre holds about 15.5 tennis courts or 9.3 basketball courts. The converter also compares it with the finished area of our example ranch house.
Square feet to acres
| Square feet | Acres |
|---|---|
| 5,000 sq ft | 0.115 |
| 7,500 sq ft | 0.172 |
| 10,000 sq ft | 0.23 |
| 20,000 sq ft | 0.459 |
| 43,560 sq ft | 1 |
| 87,120 sq ft | 2 |
Draw your lot
Draw this lot opens the editor with a square of exactly this area as a dashed outline, with the area written in the middle. It is only a guide: it does not count as floor area. Draw your house inside it to see how much of the lot it takes.
Figure 1. One floor of 25 × 17 ft. The rooms add up to 425 sq ft.
About this page · Written by the Squaremetry team. Last checked on October 1, 2026. Found a mistake? Send us a message.