Acreage Calculator
Calculate exactly how many acres your plot of land is. Enter your lot dimensions below to instantly convert square footage, square yards, or square meters into precise acreage.
Whether you’re buying a new rural property, subdividing a suburban lot, or planning a farm, calculating acreage is an essential real estate skill. Using the acreage calculator above, you can quickly convert any rectangular plot of land—measured in feet, yards, or meters—into precise acres and square footage.
In the United States, land is predominantly measured in acres, but local surveys often provide property lines in linear feet. Knowing how to convert those dimensions (lot size to acres) protects you from miscalculating your property value.
How to Calculate Acreage (The Formula)
To determine the acreage of a rectangular parcel of land, you need to find the total area in square feet, and then divide that product by the exact number of square feet in a single acre.
The universal constant to remember is that 1 Acre equals exactly 43,560 square feet.
Acreage Formula
Acres = (Length in ft × Width in ft) ÷ 43,560
Step-by-Step Example
Let’s say you are looking at a property survey, and it states the lot is 200 feet wide by 400 feet long. How many acres is that?
- Find the total square footage: Multiply 200 ft by 400 ft to get 80,000 square feet.
- Divide by the acre constant: Divide 80,000 by 43,560.
- Result: 1.836 acres.
What is an Acre? Visualizing the Size
Because an acre is a measure of area, it does not have a fixed shape. An acre can be a perfect square, a long thin rectangle, or an irregular polygon, so long as the total area equals 43,560 square feet.
If an acre were a perfect square, it would measure approximately 208.71 feet on each side (208.71 × 208.71 = 43,560).
The easiest way to visualize an acre is to picture an American football field. A standard football field (excluding the two end zones) measures 300 feet long by 160 feet wide, totaling 48,000 square feet. Therefore, one acre is roughly 90% the size of a football field.
Common Lot Sizes to Acres Conversion Table
Below is a quick-reference chart for the most frequently searched lot dimensions. This will help you quickly gauge how large a piece of property is without pulling out a calculator.
| Lot Dimensions (Length × Width) | Total Square Feet | Calculated Acreage |
|---|---|---|
| 40 ft × 100 ft | 4,000 sq ft | 0.09 Acres (Urban Lot) |
| 60 ft × 150 ft | 9,000 sq ft | 0.21 Acres (~1/5 Acre) |
| 100 ft × 100 ft | 10,000 sq ft | 0.23 Acres (~1/4 Acre) |
| 104.35 ft × 104.35 ft | 10,890 sq ft | 0.25 Acres (Exactly 1/4 Acre) |
| 200 ft × 200 ft | 40,000 sq ft | 0.92 Acres |
| 208.71 ft × 208.71 ft | 43,560 sq ft | 1.00 Acre (Perfect Square Acre) |
| 210 ft × 210 ft | 44,100 sq ft | 1.01 Acres |
| 300 ft × 300 ft | 90,000 sq ft | 2.07 Acres |
| 330 ft × 330 ft | 108,900 sq ft | 2.50 Acres |
| 400 ft × 400 ft | 160,000 sq ft | 3.67 Acres |
| 300 ft × 600 ft | 180,000 sq ft | 4.13 Acres |
| 500 ft × 1000 ft | 500,000 sq ft | 11.48 Acres |
Calculating Acres from Meters and Yards
If your property dimensions are provided in a unit other than feet, the conversion divisor changes. Our calculator handles this automatically, but if you are doing the math manually, use these formulas:
Yards to Acres
Because there are 3 feet in a yard, one square yard equals 9 square feet. Therefore, there are exactly 4,840 square yards in one acre (43,560 ÷ 9).
Acres = (Length in yds × Width in yds) ÷ 4,840
Meters to Acres
If you are working in the metric system (or dealing with Hectares), one acre equals approximately 4,046.86 square meters.
Acres = (Length in m × Width in m) ÷ 4,046.86
Note: 1 Hectare is exactly 10,000 square meters. Therefore, 1 Hectare equals roughly 2.47 acres.
Acreage Calculator Frequently Asked Questions
To calculate acres of land, measure the length and width of the property in feet. Multiply the length by the width to find the total square footage, then divide that number by 43,560 (the precise number of square feet in one acre).
No, a 200 ft by 200 ft lot is not quite 1 acre. It equals 40,000 square feet, which is approximately 0.92 acres. A perfect square acre would be roughly 208.71 feet by 208.71 feet.
A 60 ft by 150 ft lot equals 9,000 square feet. Divide 9,000 by 43,560, and you get approximately 0.21 acres, or roughly one-fifth of an acre.
Yes, it is extremely close. 210 ft by 210 ft equals 44,100 square feet, which converts to 1.01 acres. For all practical purposes in real estate, this is considered a 1-acre lot.
A 330 ft by 330 ft lot equals 108,900 square feet. When divided by 43,560, it comes out to exactly 2.5 acres.
No, a 220 ft by 220 ft lot is slightly larger than an acre. It equals 48,400 square feet, which is 1.11 acres. A true square acre is 208.71 feet per side.
A lot measuring 300 ft by 600 ft is 180,000 square feet. Dividing this by 43,560 gives you approximately 4.13 acres.
No, 400 ft by 400 ft is much larger than 1 acre. It equals 160,000 square feet, which converts to 3.67 acres.
A 500 ft by 1000 ft parcel equals 500,000 square feet. Divide by 43,560, and you get approximately 11.48 acres.
A 1/4 acre equals exactly 10,890 square feet. If the lot were a perfect square, it would measure approximately 104.35 feet by 104.35 feet.
Reference: https://en.wikipedia.org/wiki/Acre