Lot Size Calculator
Find the size of any lot in seconds. Enter your lot’s length and width and choose your unit — this lot acreage calculator returns the size in acres, square feet, square meters and hectares. Ideal for real estate listings, property research and building lots.
Lot Dimensions → Size
Assumes a rectangular lot. For irregular lots, measure the boundary on a map.
How to Calculate Lot Size
A rectangular lot’s size is length × width, converted to your preferred unit:
Square feet = Length (ft) × Width (ft) Acres = Square feet ÷ 43,560
A 150 ft × 100 ft lot is 15,000 square feet, which is about 0.34 acres — a typical suburban lot.
Typical Lot Sizes
| Lot type | Approx. size |
|---|---|
| Small city lot | 2,500 – 5,000 ft² (0.06 – 0.11 acre) |
| Standard suburban lot | 7,000 – 12,000 ft² (0.16 – 0.28 acre) |
| Quarter-acre lot | 10,890 ft² (0.25 acre) |
| Half-acre lot | 21,780 ft² (0.5 acre) |
| Large / rural lot | 1+ acre (43,560+ ft²) |
The median lot size for a new single-family home in the US is roughly 0.19 acres (about 8,300 ft²).
Measure an Irregular Lot
Most lots aren’t perfect rectangles. If yours has angled edges or more than four sides, this length × width estimate will be off. To get the true size, trace the lot boundary on satellite imagery with the acreage calculator map, which uses the real GPS coordinates of each corner. You can also convert a known area with the acres to square feet calculator.
Frequently Asked Questions
How do I calculate my lot size in acres?
Multiply the lot's length by its width to get the area in square feet, then divide by 43,560 to get acres. For example, a 150 ft × 100 ft lot is 15,000 ft² ÷ 43,560 = 0.34 acres.
How many square feet is a typical lot?
A standard suburban lot is roughly 7,000–12,000 square feet. The US median new-home lot is around 8,300 ft², or about 0.19 acres.
How do I find the size of an irregular lot?
Measure it on a map. Tracing the boundary on satellite imagery with the Marea acreage calculator accounts for angled and irregular edges automatically.
Try Marea Today
Download Marea on iOS or Android and start measuring in seconds.
