Enter an area, choose the units and get the converted value instantly.
Converted area
1 ac → Square Feet
For regional units, the selected standard is part of the result. For legal or registered property records, follow the measurement used by the relevant authority or document.
Direct answer
Acre To Square Feet
1 acre equals exactly 43,560 square feet using the international foot definition.
Formula
Square feet = acres × 43,560
What this conversion means
Acres are commonly used for land parcels, farms and large development sites, while square feet are easier for detailed plot and building calculations. This tool converts between the two without approximating the acre.
Use acre-to-square-foot conversion when a land title or listing gives acreage but you need a detailed area for pricing, planning, subdivision comparisons or development calculations.
NIST lists one international-foot acre as exactly 43,560 square feet and 4,046.8564224 square meters.
Common values
Acre to Square Feet conversion table
| Acre | Square Feet |
|---|---|
| 0.25 ac | 10,890 ft² |
| 0.5 ac | 21,780 ft² |
| 1 ac | 43,560 ft² |
| 2 ac | 87,120 ft² |
| 5 ac | 217,800 ft² |
| 10 ac | 435,600 ft² |
| 25 ac | 1,089,000 ft² |
| 50 ac | 2,178,000 ft² |
| 100 ac | 4,356,000 ft² |
Sources & method
How AR Empires checks conversion factors
For standard international units, the calculator uses published measurement references. For regional land units, the page identifies the selected convention and links to government or land-record material where available. A calculator result should not replace the measurement written on a registered property record.
Related conversions
Continue with another area conversion
Square Feet to Acre Converter
1 square foot equals 1/43,560 acre, or about 0.00002295684 acre.
Open converterAcre to Hectare Converter
1 international-foot acre equals 0.40468564224 hectare.
Open converterAcre to Kanal Converter
Under the Punjab revenue standard, 1 acre equals 8 kanal, or 160 marla. If a private scheme uses a different nominal marla size, its acreage comparison can differ.
Open converterUseful AR Empires resources
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Read moreFrequently asked questions
Questions about acre to square feet
How many square feet are in 1 acre?
1 acre contains exactly 43,560 square feet using the international foot.
How many square feet are in half an acre?
0.5 acre equals 21,780 square feet.
How many square feet are in 5 acres?
5 acres equals 217,800 square feet.
How accurate is the AR Empires area converter?
The calculator uses fixed conversion factors for standard units and keeps more precision internally than it displays. Regional units such as marla and bigha need the correct local standard, so check the selected standard before using a result for a property document or transaction.
Last reviewed: 20 September 2026. Conversion pages are informational tools; verify regional land standards against the relevant authority or property document when accuracy has legal or financial consequences.