Acres to Square Feet Calculator
Enter acreage
Use decimal acres, such as 0.25 for a quarter acre or 2.5 for two and a half acres.
Must be zero or greater.
Results
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Acres to square feet formula
The standard conversion is 1 acre = 43,560 square feet. This tool uses:
- Square feet:
acres x 43,560 - Square yards:
square feet / 9 - Square meters:
square feet x 0.09290304 - Hectares:
acres x 0.40468564224
Assumption: the acre value is a flat land-area measure. This is a unit conversion tool, not a survey, zoning, title, or legal boundary calculator.
Use the converted square-foot value as a starting point when comparing parcels, estimating broad coverage, or translating property descriptions into the units used by a supplier. If the original acre figure is rounded, the square-foot result is rounded in the same practical sense even though the conversion factor is exact. For purchase, permitting, fencing, drainage, or boundary decisions, rely on a survey, plat, deed, or local professional rather than a unit conversion alone.
How to use the result
- Enter the land area in acres. Decimal values are supported.
- Choose a display precision that matches your source measurement.
- Use the square-foot result for coverage, rough planning, or comparison with property listings.
- For material estimates, combine this result with measured shape details and waste factors in a project-specific calculator.
Acres to square feet FAQs
Is 1 acre exactly 43,560 square feet?
Yes. The acre used here is the international acre, which is exactly 43,560 square feet.
How many square feet are in a half acre?
A half acre is 21,780 square feet because 0.5 x 43,560 = 21,780.
How many square feet are in a quarter acre?
A quarter acre is 10,890 square feet because 0.25 x 43,560 = 10,890.
Why might a property's usable area be smaller than the acre conversion?
Setbacks, easements, slopes, wetlands, roads, buildings, and local rules can reduce usable area. This calculator only converts units.