Acreage Calculator
Use this free acreage calculator to quickly determine the size of land in acres. Enter dimensions like length and width to get accurate results, making it easy to measure plots, farms, yards, and real estate properties for planning and development.
1 acre = 43,560 sq ft · A square acre measures approx 208.7 × 208.7 ft · 1 mile² = 640 acres · A standard city block ≈ 2–5 acres
How Does the Acreage Calculator Work?
This calculator converts any length and width measurement into acres — the standard US unit of land area. Enter your dimensions in feet, yards, meters, miles, or surveying chains, choose your lot shape (rectangle, triangle, or circle), and the calculator instantly shows acreage plus square feet, square yards, hectares, and square miles.
Acreage is used for land purchase and sale, property tax assessment, zoning and permit applications, agricultural planning, and landscaping cost estimation. Knowing the exact acreage of a parcel is essential before purchasing, fencing, or planning any development.
Your property's acreage is recorded on your deed, in your county assessor's records (usually searchable online for free), and on your property tax bill. You can also look up any parcel's acreage using your county's GIS mapping portal — search "[your county] GIS parcel viewer" to find it. For legal purposes, always use the recorded deed acreage rather than a calculated estimate.
Acreage Reference Guide
It's hard to visualize acreage without a reference point. Here are common comparisons to help put lot sizes in perspective.
| Acreage | Sq Ft | Dimensions (if square) | Comparable To |
|---|---|---|---|
| 0.10 acre | 4,356 sq ft | 66 × 66 ft | Typical urban row home lot |
| 0.25 acre | 10,890 sq ft | 104 × 104 ft | Standard suburban lot (quarter acre) |
| 0.50 acre | 21,780 sq ft | 147 × 147 ft | Half-acre — room for large yard & outbuilding |
| 1 acre | 43,560 sq ft | 209 × 209 ft | Standard football field minus end zones |
| 2 acres | 87,120 sq ft | 295 × 295 ft | Small hobby farm lot |
| 5 acres | 217,800 sq ft | 467 × 467 ft | Small farm / large rural homestead |
| 10 acres | 435,600 sq ft | 660 × 660 ft | Medium farm parcel — ¼ mile × ¼ mile |
| 40 acres | 1,742,400 sq ft | 1,320 × 1,320 ft | USGS quarter-quarter section |
| 640 acres | 27,878,400 sq ft | 1 mile × 1 mile | 1 square mile = 1 section (PLSS) |
The quarter-acre lot (10,890 sq ft, approximately 75×145 ft for a typical rectangular suburban lot) has been the standard US suburban lot size since the post-WWII housing boom. Most zoning codes in established suburbs are built around this lot size for setback, coverage, and accessory structure rules. Lots smaller than 0.15 acres are common in urban areas and newer density-zoned developments; lots larger than 0.5 acres are typical in rural and semi-rural areas.
Acreage Unit Conversion Table
| From | To Acres | Multiply By | Example |
|---|---|---|---|
| Square Feet | Acres | ÷ 43,560 | 87,120 sq ft ÷ 43,560 = 2 acres |
| Square Yards | Acres | ÷ 4,840 | 9,680 sq yd ÷ 4,840 = 2 acres |
| Square Meters | Acres | ÷ 4,046.86 | 8,093.7 sq m ÷ 4,046.86 = 2 acres |
| Hectares | Acres | × 2.4711 | 1 hectare × 2.4711 = 2.47 acres |
| Square Miles | Acres | × 640 | 0.5 sq mi × 640 = 320 acres |
| Acres | Square Feet | × 43,560 | 2.5 acres × 43,560 = 108,900 sq ft |
| Acres | Hectares | × 0.4047 | 5 acres × 0.4047 = 2.02 hectares |
Example Calculations
Example 1 — Standard Suburban Lot
75 × 145 = 10,875 sq ft
10,875 ÷ 43,560 = 0.2496 acres ≈ ¼ acre
Example 2 — Rural Parcel in Acres
1,320 × 660 = 871,200 sq ft
871,200 ÷ 43,560 = 20 acres
Example 3 — Converting Hectares to Acres
3.5 × 2.4711 = 8.65 acres
8.65 × 43,560 = 376,794 sq ft
Example 4 — Triangular Lot
Area = ½ × 200 × 180 = 18,000 sq ft
18,000 ÷ 43,560 = 0.413 acres