Acre to Square Feet Calculator
1 Acre = 43,560 Square Feet (exact). Handy for lot sizes, farmland listings and property plans.
Acre to Square Feet Formula
To convert acres to square feet, multiply the number of acres by 43,560. The factor is exact: one acre is defined as 1 furlong × 1 chain, or 10 square chains, which equals 43,560 square feet.
Example: 2.5 Acres × 43,560 = 108,900 Square Feet. A quarter-acre lot: 0.25 × 43,560 = 10,890 Square Feet.
Acre to Square Feet – Quick Reference Table
Common conversion values for quick reference
| Acre | Square Feet | Square Yards | Square Meters |
|---|---|---|---|
| 0.1 Acre | 4,356 | 484.0 | 404.7 |
| 0.25 Acre | 10,890 | 1,210.0 | 1,011.7 |
| 0.5 Acre | 21,780 | 2,420.0 | 2,023.4 |
| 1 Acre | 43,560 | 4,840.0 | 4,046.9 |
| 2 Acre | 87,120 | 9,680.0 | 8,093.7 |
| 5 Acre | 217,800 | 24,200.0 | 20,234.3 |
| 10 Acre | 435,600 | 48,400.0 | 40,468.6 |
| 40 Acre | 1,742,400 | 193,600.0 | 161,874.3 |
| 100 Acre | 4,356,000 | 484,000.0 | 404,685.6 |
| 640 Acre | 27,878,400 | 3,097,600.0 | 2,589,988.1 |
Acre to Square Feet – Conversion Guide
Property listings in the United States, Canada, the UK and Australia often quote land in acres while building plans, floor areas and small lots are measured in square feet. Converting between them is a single multiplication, because an acre is defined as exactly 43,560 square feet.
Formula
- Square Feet = Acres × 43,560
- Acres = Square Feet ÷ 43,560 (use the Square Feet to Acre Calculator)
- 1 Acre = 4,840 Square Yards = 4,046.8564 Square Meters
Worked examples
- 0.25 Acre = 10,890 sq ft – a typical suburban lot size in many regions
- 1 Acre = 43,560 sq ft
- 2.5 Acres = 108,900 sq ft
- 10 Acres = 435,600 sq ft
- 640 Acres = 27,878,400 sq ft = 1 square mile
A sense of scale
An American football field including both end zones (360 ft × 160 ft) covers 57,600 square feet, which is about 1.32 acres. A square acre is roughly 208.7 feet on each side.
International acre vs US survey acre
Almost all everyday conversions use the international acre (exactly 4,046.8564224 m²). In the United States, some legal land descriptions use the US survey foot, which makes a survey acre about 0.0004% larger. The gap is roughly 17 square feet on 100 acres, so it only matters for formal surveys.