How Big Is an Acre?
An acre is 43,560 square feet — a square about 208.7 feet on each side, or roughly three-quarters of a football field. In metric terms that is 4,047 m² (0.4047 hectares).
Numbers only go so far. Search your own address below and the map drops a real one-acre square on your land — drag it around the satellite imagery to see exactly what an acre covers in your neighborhood.
The dimensions of an acre
An acre measures area, not shape, so there are no fixed “dimensions of an acre.” Historically it was the strip a team of oxen could plow in a day: 1 furlong long (660 ft) by 1 chain wide (66 ft). Every rectangle below is exactly one acre:
| Width (ft) | Length (ft) | Shape |
|---|---|---|
| 208.7 | 208.7 | A perfect square acre |
| 66 | 660 | The classic surveyor's acre: 1 chain × 1 furlong |
| 100 | 435.6 | A common deep rural lot |
| 150 | 290.4 | A wide suburban-style parcel |
| 200 | 217.8 | Nearly square |
| 50 | 871.2 | A long, narrow strip — still exactly one acre |
In miles, a square acre is about 0.04miles per side. Scale up and the survey grid appears: 640 acres make one square mile (a section), and dividing a section into sixteenths gives the classic 40-acre “quarter-quarter” — the “back forty.”
What an acre looks like
One acre holds:
| Comparison | How many fit in 1 acre | Notes |
|---|---|---|
| American football field (incl. end zones) | 0.76 | An acre covers about 3/4 of the field |
| Tennis courts (doubles, 78 × 36 ft) | 15.5 | Court area only, no runback space |
| Basketball courts (NBA, 94 × 50 ft) | 9.3 | Court area only |
| Parking spaces (incl. drive aisles) | ~182 | About 269 raw 9 × 18 ft stalls if you skip the aisles |
Half an acre is 21,780 ft² — a square about 147.6 ft per side, which is a generous suburban lot. If you are sizing up a specific property instead of a round number, trace its actual boundary with the acreage calculator.
See it at every size
Each page overlays that exact acreage on the map so you can visualize it on your own land.
Related tools
Frequently asked questions
- What are the dimensions of an acre in feet?
- An acre has no fixed shape — it is any area that totals 43,560 square feet. A perfectly square acre measures about 208.7 × 208.7 feet, and the classic surveyor's acre is 66 × 660 feet (one chain by one furlong). Any rectangle with the same area counts: 100 × 435.6 ft and 150 × 290.4 ft are both exactly one acre.
- How big is an acre visually?
- An acre is about 0.76 of an American football field including the end zones, roughly 15.5 tennis courts, or about 9 basketball courts. The fastest way to really feel the size is to search your own address in the map on this page — it drops a one-acre square right on your neighborhood, and you can drag it around to compare it with yards and fields you know.
- How many football fields is an acre?
- An acre is 0.76 of a football field including the end zones — a bit more than three-quarters. Flipped around, a full football field is 1.32 acres. Our football field page walks through the math with and without the end zones.
- How big is half an acre?
- Half an acre is 21,780 square feet — a square roughly 147.6 feet on each side. That is comfortably enough land for a typical suburban home with a large yard, a garden and a shed. See our half-acre page to overlay one on your own lot.
- How big is an acre in miles?
- A square acre is only about 0.04 miles (208.7 feet) per side, so an acre is tiny next to a square mile. It takes 640 acres to fill one square mile — called a section in the Public Land Survey System — and the familiar 40-acre parcel is a quarter of a quarter section.