Acres to Square Feet Calculator
Convert acres to square feet instantly. Type any acreage below and get the exact size in square feet, square meters, hectares and more. One acre equals 43,560 square feet — this calculator does the math for you, in both directions.
Acreage ↔ Square Feet Converter
Editing either field updates the other automatically. 1 acre = 43,560 ft².
How to Convert Acres to Square Feet
The conversion is a simple multiplication:
Square feet = Acres × 43,560
So to convert acres to square feet, multiply the number of acres by 43,560. For example, 2.5 acres × 43,560 = 108,900 square feet.
To go the other way (square feet to acres), divide by 43,560 instead. See our dedicated square feet to acres calculator.
Acres to Square Feet Conversion Table
| Acres | Square Feet |
|---|---|
| 0.1 acre | 4,356 ft² |
| 0.25 acre | 10,890 ft² |
| 0.5 acre | 21,780 ft² |
| 1 acre | 43,560 ft² |
| 2 acres | 87,120 ft² |
| 5 acres | 217,800 ft² |
| 10 acres | 435,600 ft² |
| 20 acres | 871,200 ft² |
| 40 acres | 1,742,400 ft² |
| 100 acres | 4,356,000 ft² |
What Is an Acre?
An acre is a unit of land area used mainly in the United States and United Kingdom. It was historically defined as the area a yoke of oxen could plough in a day. Today it is standardised as exactly 43,560 square feet, which is the same as 4,840 square yards or about 4,047 square meters.
| 1 acre equals | Value |
|---|---|
| Square feet | 43,560 ft² |
| Square yards | 4,840 yd² |
| Square meters | 4,046.86 m² |
| Hectares | 0.4047 ha |
| Square miles | 0.001563 mi² |
A useful mental picture: one acre is roughly the size of a standard American football field without the end zones (which is about 48,000 ft² with them).
Measure Acreage Directly on a Map
Don’t know the acreage yet? Instead of converting a number you already have, you can measure any plot of land straight from satellite imagery with the acreage calculator map — tap around a boundary and read the acreage instantly. It’s the fastest way to find the size of a field, lot or property.
Frequently Asked Questions
How many square feet are in an acre?
There are exactly 43,560 square feet in one acre. This is a fixed, standardised value.
How do I convert acres to square feet?
Multiply the number of acres by 43,560. For example, 3 acres × 43,560 = 130,680 square feet.
How many square feet is a quarter acre?
A quarter acre (0.25 acres) is 10,890 square feet.
How many square feet is half an acre?
Half an acre (0.5 acres) is 21,780 square feet.
Do I need to sign up to use this calculator?
No. The acres to square feet converter works instantly in your browser with no sign-up. To measure land on a map, download the Marea app on iOS and Android.
Try Marea Today
Download Marea on iOS or Android and start measuring in seconds.
