Lot Size to Acres Calculator
Enter your lot dimensions and get the area in acres right away, along with square feet, hectares, square metres, square yards, and the perimeter for fencing estimates. Switch between feet, yards, metres, miles and inches. The price-per-acre field lets you estimate land value from any dimension.
How to convert a lot size to acres
An acre contains exactly 43,560 square feet. To convert any rectangular lot to acres, multiply its length by its width (both in feet) to get square feet, then divide by 43,560. If your measurements are in other units, convert to feet first: multiply yards by 3, metres by 3.28084, or inches by 0.0833. The formula is straightforward: Area (acres) = (Length x Width) / 43,560. For a 330 x 132 foot lot, that is 43,560 / 43,560 = exactly 1 acre, because 330 x 132 = 43,560.
What does the perimeter figure tell me?
The perimeter is the total boundary length of the rectangular lot - the sum of all four sides. It is useful for fencing estimates: divide the perimeter by the number of linear feet your fencing material covers to get the number of fence posts or panels you need. For example, a 1-acre square lot (208.7 ft x 208.7 ft) has a perimeter of about 835 linear feet. If each fence panel covers 8 feet, you would need roughly 105 panels. Keep in mind that gates, corners, and post spacing will add to that figure.
Acres, hectares, and other area units
The acre is the primary land-area unit in the United States, Canada, and the United Kingdom for parcels up to several thousand acres. One acre equals 0.404686 hectares, which is the standard unit in most other countries. For very small lots, square feet or square yards are more practical; for very large holdings, square miles (640 acres per square mile) or square kilometres are used. This calculator shows all common conversions at once so you can communicate your lot size in whatever unit a buyer, lender, or surveyor expects.
Using the price-per-acre field
Real estate is often priced on a per-acre basis, especially for rural and agricultural land. Enter the asking or appraised price per acre and the calculator multiplies it by your lot size to produce a total value estimate. For example, if comparable land sells for $15,000 per acre and your lot is 2.5 acres, the estimate is $37,500. This is a quick back-of-envelope figure only - actual value depends on access, utilities, zoning, soil quality, and comparable sales. Always obtain a professional appraisal for any transaction.
Common lot size benchmarks
| Lot type | Typical acres | Square feet | Notes |
|---|---|---|---|
| Urban row house | 0.03 - 0.10 | 1,300 - 4,356 | Dense city lots |
| Standard suburban | 0.10 - 0.25 | 4,356 - 10,890 | Typical subdivision minimum |
| Quarter acre | 0.25 | 10,890 | Common suburban benchmark |
| Half acre | 0.50 | 21,780 | Upper suburban range |
| One acre | 1.00 | 43,560 | 208.7 ft x 208.7 ft square |
| 2-acre lot | 2.00 | 87,120 | Semi-rural residential |
| 5-acre parcel | 5.00 | 217,800 | Small hobby farm |
| 1 hectare | 2.471 | 107,639 | Metric reference |
| 1 football field | 1.32 | 57,600 | Including end zones |
Reference sizes help you put your lot in context with typical residential and agricultural parcels.
Frequently asked questions
How many square feet are in an acre?
One acre equals exactly 43,560 square feet. The acre was historically defined as the amount of land an ox could plough in one day, which was standardised to a furlong (660 ft) by a chain (66 ft), giving 43,560 sq ft. A square acre would have sides of about 208.71 feet.
How do I calculate lot size in acres from feet?
Multiply the lot length by the lot width (both in feet) to get the area in square feet, then divide by 43,560. For example, a 150 x 100 ft lot is 15,000 sq ft, and 15,000 / 43,560 = 0.344 acres.
How many acres is a typical residential lot?
A typical suburban lot in the United States is between 0.10 and 0.25 acres (roughly 4,356 to 10,890 sq ft). A quarter-acre lot (10,890 sq ft) is a common benchmark. New subdivisions often set a minimum of 6,000 sq ft (about 0.14 acres), while older neighborhoods can have much larger lots.
What is the difference between an acre and a hectare?
Both measure land area, but they are used in different parts of the world. One acre equals 0.404686 hectares, so one hectare equals about 2.471 acres. The acre is the standard unit in the US and UK; the hectare is used in most other countries and in international agricultural statistics.
Can I use this calculator for non-rectangular lots?
This calculator assumes a rectangular lot. For L-shaped, triangular, or irregular parcels, split the lot into rectangles or triangles, calculate each section separately, and add the areas together. For triangles, the area is 0.5 x base x height. A licensed surveyor can measure irregular boundaries precisely using coordinate geometry.
How do I convert square metres to acres?
Divide the square metres by 4,046.856 to get acres. Alternatively, multiply by 0.000247105. For example, 2,000 square metres is 2,000 / 4,046.856 = 0.494 acres, or roughly half an acre.