Convert square feet to acres instantly. Enter a lot or parcel size in square feet and see it in acres — plus square yards — using the exact conversion (1 acre = 43,560 sq ft).
Uses the exact survey conversion: 1 acre = 43,560 square feet. For an odd-shaped parcel, use the total area in square feet.
One acre is defined as exactly 43,560 square feet, so to convert, you divide the square footage by 43,560. For example, a 10,000-square-foot lot is 10,000 ÷ 43,560 ≈ 0.23 acres.
Acres = square feet ÷ 43,560
This tool also shows square yards (÷ 9) and square meters (× 0.092903) for the same area.
Exactly 43,560 square feet. So to convert square feet to acres, divide by 43,560; to go the other way, multiply acres by 43,560.
About 0.23 acres (10,000 ÷ 43,560). A quarter-acre lot is 10,890 sq ft, and a half-acre is 21,780 sq ft.
Related: acres to square feet · square feet to square meters · price per square foot.
Yes. The Square Feet to Acres Calculator is completely free, runs in your browser, and never asks for a signup, email, or download. Enter your numbers and the result updates instantly.
It uses standard formulas and recalculates the moment you change a value, so the math is exact for the inputs you enter. Treat the result as a reliable planning estimate; for decisions with legal or tax consequences, confirm the figures with a qualified professional.
Yes. The calculator is mobile-friendly and works on any phone, tablet, or computer — there is no app to install and nothing to save.
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Last reviewed: September 2026. Free to use, no signup — Square Feet to Acres Calculator by ToolWise Digital.
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