Acres to Square Feet Converter
Enter the area in acres below to convert it to square feet.
Convert Acres to Square Feet
Enter a value in acres (ac) to convert to square feet (ft²).
Acre to Square Foot Conversion Table
Table showing various acre measurements converted to square feet. Click any preset value or arrow to load it into the converter.
| Acres (ac) | Square Feet (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 |
| 15 ac | 653,400 ft² |
| 20 ac | 871,200 ft² |
| 25 ac | 1,089,000 ft² |
| 30 ac | 1,306,800 ft² |
| 50 ac | 2,178,000 ft² |
How to Convert Acres to Square Feet
To convert acres to square feet, multiply the area by the following conversion ratio: 43,560 square feet/acre.
Since one acre is equal to 43,560 square feet, you can use this simple formula to convert:
The area in square feet is equal to the area in acres multiplied by 43,560.
For example, here's how to convert 1 acres to square feet using the formula above.
How Many Square Feet Are in an Acre?
There are 43,560 square feet in an acre, which is why we use this value in the formula above.
Our acre to square foot calculator automatically converts your area measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Acres and square feet are both units used to measure area. Keep reading to learn more about each unit.
What Is an Acre?
An acre is a unit of area equal to 4,046.8564224 square meters (m²), the base unit for area. Imperial & US Customary land unit equal to 43,560 square feet. [1]
The acre is classified as a US customary and imperial unit of area. Acres can be abbreviated as ac; for example, 1 acre can be written as 1 ac.
When working with acres (ac) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, acres (ac) are widely used across large-scale industrial, bulk, and macro-level area specifications within US customary and imperial workflows, engineering documentation, and technical data sheets.
What Is a Square Foot?
A square foot is a unit of area equal to 0.092903 square meters (m²), the base unit for area. Imperial area equal to 144 square inches (0.09290304 m²). [2]
The square foot is classified as a US customary and imperial unit of area. Square Feet can be abbreviated as ft²; for example, 1 square foot can be written as 1 ft².
When working with square feet (ft²) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, square feet (ft²) are widely used across standard area applications within US customary and imperial workflows, engineering documentation, and technical data sheets.
When converting area between acres (ac) and square feet (ft²), keep full floating-point precision (1 ac = 43,560 ft²; 1 ft² = 0.000022957 ac) during intermediate calculations and round only the final square foot figure to match your instrument tolerance.
More Acre & Square Foot Conversions
Need to calculate in the opposite direction? Use our square feet to acres converter (ft² to ac) to switch your starting unit immediately. You can also explore related tools such as converting square meters to square feet, converting square yards to square feet, or converting acres to hectares.
Convert from Acres
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length & Area)·Area Metrology Standard — Acres (ac) to Square Feet (ft²)
- [2]NIST HB 44 SpecificationNIST HB 44 (Acre, Hectare & Land Survey Tables)·Unit Specifications: Acre (ac) & Square Foot (ft²)
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9 (Area))·Conversion Factors & Mathematical Basis (ac to ft²)