How to convert square feet to acres
One acre is exactly 43,560 square feet. To convert square feet to acres, divide the number of square feet by 43,560.
Acres = square feet ÷ 43,560
For example, a 10,000 square foot lot is 10,000 ÷ 43,560 = 0.23 acres.
Square feet to acres conversion table
| Square feet | Acres |
|---|---|
| 5,000 | 0.115 |
| 7,500 | 0.172 |
| 10,000 | 0.230 |
| 10,890 | 0.25 (quarter acre) |
| 21,780 | 0.5 (half acre) |
| 43,560 | 1 |
| 87,120 | 2 |
| 217,800 | 5 |
| 435,600 | 10 |
How big is an acre?
An acre can be any shape. As a square it is about 208.7 feet on each side. It is about three quarters of an American football field including the end zones.
Frequently asked questions
How many square feet are in an acre?
There are 43,560 square feet in one acre.
How many square feet is half an acre?
Half an acre is 21,780 square feet.
How many square feet is a quarter acre?
A quarter acre is 10,890 square feet.
How do I find the acreage of my lot?
Multiply the lot’s length by its width in feet to get square feet, then divide by 43,560. For irregular lots, use the acreage calculator.