Quick answer: One acre equals 43,560 square feet. To convert, multiply acres ร 43,560 for square feet, or divide square feet รท 43,560 for acres. This acreage calculator converts acres to square feet, square inches, and irregular lots instantly.
Instantly convert between Acres, Square Feet, and Square Inches. Just type in any box, and the others will update automatically!
There are exactly 43,560 square feet in one acre.
Because "43,560" is a hard number to visualize, contractors and real estate professionals use a few common comparisons to picture an acre of land:
If you are looking at a perfectly square room, calculating square footage is easy: Length ร Width = Square Footage. But real-world buildings and land lots are rarely perfect squares. They have bay windows, L-shaped additions, and angled property lines.
Here is the "Grid Method" that contractors use to easily calculate the square footage of any irregular shape:
Draw a rough sketch of your building or lot. Divide the irregular shape into smaller, manageable rectangles (or squares). Label them Area A, Area B, Area C, etc.
Measure the length and width of each individual rectangle and multiply them together.
If your lot has an angled property line or your roof has a triangular gable, use the triangle formula: 0.5 ร Base ร Height. Measure the longest straight edge (the base) and the perpendicular distance to the opposite point (the height).
Simply add the square footage of all your rectangles and triangles together to get your total building footprint or lot size.
Keep this table handy when looking at real estate listings or planning large-scale landscaping and fencing projects. For example, the square footage of 0.25 acres is exactly 10,890 sq ft, and 0.18 acres works out to about 7,841 sq ft.
| Fraction of Acre | Square Feet | Common Use Case |
|---|---|---|
| 1/10 Acre (0.10 acres) | 4,356 sq ft | Tiny home lot, small urban garden |
| 1/4 Acre (0.25 acres) | 10,890 sq ft | Standard suburban residential lot |
| 0.18 Acres | 7,841 sq ft | Compact city lot, townhome yard |
| 0.30 Acres | 13,068 sq ft | Oversized suburban lot |
| 1/2 Acre (0.50 acres) | 21,780 sq ft | Large suburban lot, small horse paddock |
| 1 Acre | 43,560 sq ft | Custom home estate, large orchard |
| 5 Acres | 217,800 sq ft | Small farm, hobby farm, large pond |
| 10 Acres | 435,600 sq ft | Commercial agriculture, large timber plot |
There are 144 square inches in a single square foot (because 12 inches ร 12 inches = 144). To convert square inches to square feet, simply divide your total square inches by 144. For example, a countertop that is 2,880 square inches is exactly 20 square feet.
No. A 200 ft by 200 ft square is equal to 40,000 square feet. Since one acre is 43,560 square feet, a 200x200 plot is slightly less than one acre (it is exactly 0.918 acres).
A standard American football field, including the two 10-yard end zones, is 120 yards long and 53.3 yards wide. This equals 57,600 square feet, which is roughly 1.32 acres. If you exclude the end zones and only count the playing field, it is exactly 1 acre.