Square Foot (ft²)
A square foot is the area of a square one foot per side, equal to exactly 0.09290304 square meters.
Square feet describe US home floor area, office leases, and retail space listings.
Square Foot to Acre
Convert square foot to acre instantly. Type in either field — results update live.
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Area Square Foot Acre
1 square foot = 0.0000229568 acres
Unit
Unit
Conversion table
Selected ft² values converted to ac using the exact factor from this tool.
| ft² | ac |
|---|---|
| 0.01 | 2.295684e-7 |
| 0.1 | 0.0000022957 |
| 1 | 0.0000229568 |
| 2 | 0.0000459137 |
| 3 | 0.0000688705 |
| 5 | 0.0001147842 |
| 10 | 0.0002295684 |
| 20 | 0.0004591368 |
| 50 | 0.0011478421 |
| 100 | 0.0022956841 |
| 1,000 | 0.0229568411 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 ft² = 0.0000229568 ac
1 ac = 43560 ft²
To convert square foot to acre, multiply by 0.0000229568.
To convert acre to square foot, multiply by 43560.
Example: convert 10 ft² to ac
10 × 0.0000229568 = 0.0002295684 ac
About these units
Short background on the units used in this conversion.
Acre (ac)
An acre is 43,560 square feet, or exactly 4,046.8564224 square meters — a traditional land measure.
Acres parcel farmland, suburban lots, and parks in the United States, UK, and several Commonwealth countries.
Frequently asked questions
How many acres are in one square foot?
One square foot equals 0.0000229568 acres. Multiply your square feet value by 0.0000229568 to convert to acres.
What is the conversion formula?
ac = ft² × 0.0000229568The reverse is
ft² = ac × 43,560, using the same exact factors as this converter.Is this Square Foot to Acre converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All square foot conversions
Jump to any area conversion starting from square foot — including the reverse direction and every other unit in our dataset.
acre (ac) → square foot (ft²)
square foot (ft²) → square meter (m²)square foot (ft²) → square kilometer (km²)square foot (ft²) → square centimeter (cm²)square foot (ft²) → square millimeter (mm²)square foot (ft²) → square micrometer (µm²)square foot (ft²) → square nanometer (nm²)square foot (ft²) → square decimeter (dm²)square foot (ft²) → square dekameter (dam²)square foot (ft²) → square hectometer (hm²)square foot (ft²) → hectare (ha)square foot (ft²) → are (a)square foot (ft²) → barn (b)square foot (ft²) → square mile (mi²)square foot (ft²) → square mile (us survey) (mi² surv)square foot (ft²) → sectionsquare foot (ft²) → square yard (yd²)square foot (ft²) → square foot (us survey) (ft² surv)square foot (ft²) → sabinsquare foot (ft²) → square inch (in²)square foot (ft²) → circular inch (circ in)square foot (ft²) → acre (us survey) (ac surv)square foot (ft²) → square rod (rd²)square foot (ft²) → square rod (us survey) (rd² surv)square foot (ft²) → square perch (perch²)square foot (ft²) → square pole (pole²)square foot (ft²) → square chain (ch²)square foot (ft²) → roodsquare foot (ft²) → township (twp)square foot (ft²) → homesteadsquare foot (ft²) → square mil (mil²)square foot (ft²) → circular mil (circ mil)square foot (ft²) → square nautical mile (NM²)square foot (ft²) → arpentsquare foot (ft²) → cuerdasquare foot (ft²) → plazasquare foot (ft²) → varas castellanas cuad (varas cast.)square foot (ft²) → varas conuqueras cuad (varas con.)square foot (ft²) → electron cross section (σₑ)