Area converter
Acres to Square Feet
Acres and Square Feet measure the same quantity in different unit systems. The relationship is 1 ac = 43,560 ft², which gives 43,560 ft² per ac. Below you can convert any value, check a worked example and read the full chart.
Formula 1 ac = 43,560 ft²
Need the other direction? Square Feet to Acres.
How to convert Acres to Square Feet
An international acre is 4,046.8564224 square metres, historically the area a team could plough in a day. A square foot is 0.09290304 square metres and is standard in US and UK property.
To convert Acres to Square Feet, multiply the value in ac by 43,560. For example, 10 ac × 43,560 = 435,600 ft². This works because the ratio between the two units is constant for every value in area.
Worked examples
| ac | ft² |
|---|---|
| 1 ac | 43,560 ft² |
| 2.5 ac | 108,900 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 |
Reverse conversion
| ft² | ac |
|---|---|
| 1 ft² | 2.2957e-05 ac |
| 5 ft² | 1.1478e-04 ac |
| 10 ft² | 2.2957e-04 ac |
| 25 ft² | 5.7392e-04 ac |
| 50 ft² | 0.00114784 ac |
| 100 ft² | 0.00229568 ac |
When this conversion is useful
This is the calculation you need when you are comparing property listings, land size or building materials across measurement systems. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 ac is 43,560,000 ft².
Is the conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
ac to ft² conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Acres (ac) | Square Feet (ft²) |
|---|---|
| 1 ac | 43,560 ft² |
| 2 ac | 87,120 ft² |
| 3 ac | 130,680 ft² |
| 4 ac | 174,240 ft² |
| 5 ac | 217,800 ft² |
| 6 ac | 261,360 ft² |
| 7 ac | 304,920 ft² |
| 8 ac | 348,480 ft² |
| 9 ac | 392,040 ft² |
| 10 ac | 435,600 ft² |
| 11 ac | 479,160 ft² |
| 12 ac | 522,720 ft² |
| 13 ac | 566,280 ft² |
| 14 ac | 609,840 ft² |
| 15 ac | 653,400 ft² |
| 16 ac | 696,960 ft² |
| 17 ac | 740,520 ft² |
| 18 ac | 784,080 ft² |
| 19 ac | 827,640 ft² |
| 20 ac | 871,200 ft² |
| 21 ac | 914,760 ft² |
| 22 ac | 958,320 ft² |
| 23 ac | 1,001,880 ft² |
| 24 ac | 1,045,440 ft² |
| 25 ac | 1,089,000 ft² |
| 26 ac | 1,132,560 ft² |
| 27 ac | 1,176,120 ft² |
| 28 ac | 1,219,680 ft² |
| 29 ac | 1,263,240 ft² |
| 30 ac | 1,306,800 ft² |
| 31 ac | 1,350,360 ft² |
| 32 ac | 1,393,920 ft² |
| 33 ac | 1,437,480 ft² |
| 34 ac | 1,481,040 ft² |
| 35 ac | 1,524,600 ft² |
| 36 ac | 1,568,160 ft² |
| 37 ac | 1,611,720 ft² |
| 38 ac | 1,655,280 ft² |
| 39 ac | 1,698,840 ft² |
| 40 ac | 1,742,400 ft² |
| 41 ac | 1,785,960 ft² |
| 42 ac | 1,829,520 ft² |
| 43 ac | 1,873,080 ft² |
| 44 ac | 1,916,640 ft² |
| 45 ac | 1,960,200 ft² |
| 46 ac | 2,003,760 ft² |
| 47 ac | 2,047,320 ft² |
| 48 ac | 2,090,880 ft² |
| 49 ac | 2,134,440 ft² |
| 50 ac | 2,178,000 ft² |
| 60 ac | 2,613,600 ft² |
| 70 ac | 3,049,200 ft² |
| 80 ac | 3,484,800 ft² |
| 90 ac | 3,920,400 ft² |
| 100 ac | 4,356,000 ft² |
Frequently asked questions
How many Square Feet are in 1 Acres?
1 ac equals 43,560 ft².
How do I convert Acres to Square Feet?
Multiply the ac value by 43,560. Example: 25 ac = 1,089,000 ft².
What is 2.5 ac in ft²?
2.5 ac = 108,900 ft².
Is the ac to ft² conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.