Acres to Square Feet Converter
Convert acres to square feet using the standard 43,560 conversion factor.
What this tool does
Convert land area from acres to square feet using the US customary conversion factor.
How to use
- Enter the number of acres.
- View the square feet result instantly.
- Use the reverse converter link if you need square feet to acres.
Formula
square feet = acres × 43,560
Examples
2.5 acres
Input: 2.5
Output: 108900
2.5 × 43,560 = 108,900 square feet.
1 acre
Input: 1
Output: 43560
One acre equals exactly 43,560 square feet.
10 acres
Input: 10
Output: 435600
10 × 43,560 = 435,600 square feet.
Learn more
Why 43,560 square feet?
In US customary units, one acre is defined as exactly 43,560 square feet. That factor comes from the historical survey acre: a one-chain by one-furlong rectangle (66 ft × 660 ft).
Real estate listings often quote lot size in acres for rural parcels and in square feet for building footprint or urban lots. Converting between the two helps you compare listings that use different units.
From lot size to price analysis
After converting acreage to square feet, you can estimate price per square foot for land or improvements using our real estate calculator.
Common use cases
- Estimate lot size for listings
- Compare parcel sizes
- Convert acreage for construction planning
FAQ
How many square feet are in an acre?
One acre equals 43,560 square feet in US customary units.
Is 43,560 square feet always one acre?
Yes, in US customary units one acre is defined as 43,560 square feet.
Can I convert fractional acres?
Yes. Enter decimal acre values like 0.25 or 2.5.
Source notes
- US survey acre: 1 acre = 43,560 square feet.
- International acre may differ slightly in some jurisdictions.
Explore related workflows
Reverse conversion
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Last reviewed: 2026-05-23