acres to square feet calculator
Convert acres to square feet, square yards, and hectares instantly. Enter a land area in acres and see it broken down for site planning.
Land is almost always priced and zoned by the acre, but the moment you start planning what goes on it — a house pad, a driveway, a fence line — everything switches to square feet. This calculator bridges the two, plus square yards and hectares.
How this calculator works
One acre equals a fixed 43,560 square feet, so the conversion is a straight multiplication.
Formula: Square feet = acres × 43,560. Square yards = acres × 4,840. Hectares = acres × 0.404686.
Worked example
1 acre:
- Square feet: 1 × 43,560 = 43,560 ft²
- Square yards: 1 × 4,840 = 4,840 sq yd
- Hectares: 1 × 0.404686 ≈ 0.4047 ha
Reference
| Acres | Square feet |
|---|---|
| 0.25 | 10,890 ft² |
| 0.5 | 21,780 ft² |
| 1 | 43,560 ft² |
| 5 | 217,800 ft² |
Where this conversion is used
Buyers sizing up a listed acreage, builders checking setback and coverage limits against a lot’s square footage, and anyone estimating fencing, clearing, or grading costs all need this number in square feet to work with. For the reverse direction, use the Square Feet to Acres Calculator; for a broader acreage toolkit, see the Acreage Calculator.
Frequently asked questions
How many square feet are in one acre?
Exactly 43,560 square feet. This is a fixed definition, not a rounded approximation, so the conversion is always exact regardless of the acre's shape.
Why convert acres to square feet at all?
Site plans, building footprints, and material estimates (like sod or paving) are usually worked out in square feet, while the land parcel itself is described in acres. Converting lets you compare the two directly.
How many square feet is half an acre?
Half an acre is 43,560 ÷ 2 = 21,780 square feet — a good-sized suburban or rural residential lot.
What's a hectare, and why is it shown here?
A hectare is the metric unit of land area, equal to 10,000 square meters. One acre is about 0.4047 hectares, useful if you're comparing to metric survey documents or international listings.
Does the shape of the acre matter for this conversion?
No — an acre is a unit of area, not a fixed shape. A perfectly square acre and a long, narrow acre both cover exactly 43,560 square feet.
Estimates only. Verify quantities with your supplier before purchasing.