How Big Is an Acre? Land Size Comparisons
By CalcSun Research · Published November 6, 2026
An acre is 43,560 square feet. That is about 4,047 square meters, 0.405 hectares, or 4,840 square yards. Because an acre is a measure of area, it has no fixed shape — a square acre is about 208.7 feet on each side.
An Acre in Other Units
| Unit | 1 acre equals |
|---|---|
| Square feet | 43,560 sq ft |
| Square yards | 4,840 sq yd |
| Square meters | 4,046.9 m² |
| Hectares | 0.4047 ha |
| Square miles | 1/640 (0.0015625) |
| Square (side length) | ~208.7 ft × 208.7 ft |
Everyday Comparisons
- About 90% of an American football field, counting only the field of play (not the end zones).
- Roughly 16 tennis courts.
- A little smaller than a standard soccer pitch, which is typically 1.5–2 acres.
- 640 acres = 1 square mile (a "section" of land).
Where the Number Comes From
Historically an acre was the area a yoke of oxen could plow in a day — one "chain" (66 feet) by one "furlong" (660 feet), which equals 43,560 square feet. The odd number is a legacy of those old units.
Convert acres, square feet, hectares and more with the Area Converter.