Acre Calculator
How big is an acre?
One acre = 43,560 square feet = 4,046.86 m² = 0.4047 hectares — about 76% of an American football field including end zones.
An acre has no required shape; it is simply an area. Laid out as a square it measures about 208.7 feet on each side. And 640 acres = 1 square mile (a survey “section”).
The map above draws that area to true scale wherever you place it, so you can compare an acre against a block, a parking lot, or a field you already know. See the acre glossary entry for the definition, or the use cases for where this comes in handy.
How to visualize acres on the map
Find a place
Search an address or tap the map
Set the size
Type a value; pick acres, ha, ft² or m²
Pick a shape
Square or circle overlay
Drag to compare
Line it up against a known landmark
Share it
Copy a link that restores the view
What an acre compares to
of an American football field, including both end zones (a field is 57,600 sq ft ≈ 1.32 acres).
doubles tennis courts (each 78 × 36 ft = 2,808 sq ft) fit inside one acre.
acres make one square mile — the survey “section” that divides much of US farmland.
| Acres | Square feet | Square meters | Hectares | ≈ Football fields |
|---|---|---|---|---|
| 0.25 | 10,890 | 1,012 | 0.101 | 0.19 |
| 1 | 43,560 | 4,047 | 0.405 | 0.76 |
| 5 | 217,800 | 20,234 | 2.02 | 3.78 |
| 10 | 435,600 | 40,469 | 4.05 | 7.56 |
| 40 | 1,742,400 | 161,874 | 16.19 | 30.25 |
| 100 | 4,356,000 | 404,686 | 40.47 | 75.6 |
| 640 | 27,878,400 | 2,589,990 | 259 | 484 |
Football-field comparisons use a full field including end zones (360 × 160 ft = 57,600 sq ft). Figures are rounded from 1 acre = 43,560 sq ft = 4,046.86 m² = 0.4047 hectares.
Square or circle — the area is the same
An acre is a measure of area, not a shape, so the overlay can be drawn either way and still cover the same 43,560 square feet:
Square
A one-acre square is about 208.7 ft on each side. Squares line up naturally with parcels, city blocks, and the section grid, so they are easy to compare against property lines.
Circle
A one-acre circle has a radius of about 117.75 ft (117.75² × π ≈ 43,560 sq ft). Circles are handy for “how far from this point” framing, like a setback or a buffer around a building.
Frequently Asked Questions
How big is 1 acre?
What does 5 acres look like?
How big is 10 acres?
How many acres are in a square mile?
How many acres is a football field?
How do I measure acres on a map with this tool?
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