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Acres ↔ Square Feet
Forward multiplies acres by 43,560. Reverse divides square feet by 43,560.
Limitation: Uses the common international/US planning acre of 43,560 square feet.
How to Convert Acres and Square Feet
Choose direction and enter a non-negative area.
Choose acres → ft² or reverse.
Whole lots
0.25 acre = 10,890 ft². Useful when comparing house footprints to lot size.
What the Area Means
Forward multiplies acres by 43,560. Reverse divides square feet by 43,560.
Worked Examples
1 acre
Inputs
Result
Definition used here.
10,890 ft²
Inputs
Result
10890 ÷ 43560 = 0.25.
Check the other direction
Flip to reverse and paste the output to confirm you land back near the original value.
Frequently Asked Questions
Still have questions about this calculation?
Try the CalculatorConversion Formulas
Documented exact or standard factors with reverse mode.
Formula
Acres → ft²
acres × 43560
ft² → acres
ft² ÷ 43560
Scientific Background
Assumptions: 1 acre = 43,560 ft². Limitations: no hectares on this page; local survey feet may differ slightly historically.
Sources & review
Acres to Square Feet Calculator documents the references behind its formulas and assumptions. Always treat results as educational estimates, not personalized professional advice.
Last reviewed
August 2, 2026
Reference
nist.gov
https://www.nist.gov/pml/owm/si-units-lengthFree Calculator Hub methodology
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See our methodology and corrections policy.