Acreage Calculator
Convert parcel boundary dimensions and square footage into acres, hectares, and estimated land value.
Lot Visualizer & Benchmark Comparison
Standard Land Subdivision Benchmarks
| Parcel Division | Acres | Square Feet | Square Meters |
|---|---|---|---|
| 1/4 Acre (Suburban Lot) | 0.25 ac | 10,890 sq ft | 1,011.7 m² |
| 1/2 Acre (Large Residential) | 0.50 ac | 21,780 sq ft | 2,023.4 m² |
| 1 Full Acre ★ | 1.00 ac | 43,560 sq ft | 4,046.9 m² |
| 5 Acres (Small Homestead) | 5.00 ac | 217,800 sq ft | 20,234.3 m² |
| 40 Acres (Quarter-Quarter Section) | 40.0 ac | 1,742,400 sq ft | 161,874.3 m² |
| 640 Acres (1 Square Mile / Section) | 640.0 ac | 27,878,400 sq ft | 2,589,988.1 m² |
The Definition and History of an Acre
An acre is a unit of land area predominantly used in the United States customary and British imperial systems. Historically in medieval England, an acre was legally defined as the amount of land that could be plowed by a team of eight oxen in a single day. In mathematical surveyor terms, this corresponded to a strip of land one chain (66 feet) wide by one furlong (660 feet) long, yielding exactly 43,560 square feet ($66 \times 660$).
For deeper analysis and related planning, you can also explore our Concrete Calculator and Paint Calculator.
Land Conversion Mathematical Constants
1 Acre: 4,840 Square Yards (sq yd)
1 Acre: 4,046.85642 Square Meters (m²)
1 Acre: 0.40468564 Hectares (ha)
1 Square Mile (Section): 640 Acres
Square Root of 1 Acre: ~208.71 feet per side
Surveyor Units: Chains and Rods
In older American deeds and rural boundary surveys, parcel boundaries were recorded using surveyor chains:
- Rod (Pole or Perch): Exactly 16.5 feet (5.029 meters). 160 square rods equal exactly one acre.
- Gunter's Chain: Exactly 66 feet (20.117 meters), comprising 100 metal links. 10 square chains equal one acre.
- Furlong: 10 chains or 660 feet (201.168 meters).
Public Land Survey System (PLSS)
Across the western and midwestern United States, public lands were subdivided under the Thomas Jefferson Land Ordinance into Townships (6 miles square, containing 36 square miles or sections). Each Section contains 640 acres (1 square mile). Rural agricultural homesteads historically granted 160-acre quarter-sections or 40-acre quarter-quarter sections.
Frequently Asked Questions
How many square feet are in one acre?
There are exactly 43,560 square feet in one acre. In metric units, one acre equals 4,046.86 square meters or approximately 0.4047 hectares.
What are the physical dimensions of a 1-acre lot?
An acre is a measure of total area, not a fixed perimeter. If the land is a square, each side measures approximately 208.71 feet (63.6 meters). A common rectangle is 66 feet wide by 660 feet long (one surveyor chain by one furlong).
How does an acre compare to an American football field?
A standard American football field (including both end zones) is 360 feet long by 160 feet wide, totaling 57,600 square feet, which is approximately 1.32 acres. Without the end zones, the playing field is roughly 1.10 acres.
Legal Survey Disclaimer: This acreage calculator provides mathematical estimations based on planar geometric models. Actual legal property boundaries, boundary lines, easements, and topographical variations must be certified by a licensed professional land surveyor (PLS).