Acreage Calculator
Free Acreage Converter for length & area units. Enter a value to see equivalent measurements across systems. Free to use with no signup required.
Reviewed by Manoj Kumar, Mathematics Educator
Formula
Acres = (Length × Width) / 43,560 sq ft
Acreage is calculated by multiplying the length by the width to get the total area in square feet, then dividing by 43,560 (the number of square feet in one acre). Input measurements are first converted to square feet using appropriate conversion factors.
Worked Examples
Example 1: Rectangular Farm Plot
Problem:A farm plot measures 660 feet by 330 feet. How many acres is it?
Solution:Area = 660 × 330 = 217,800 sq ft\nAcres = 217,800 / 43,560 = 5.0 acres\nHectares = 5.0 × 0.4047 = 2.0235 hectares
Result:5.0 acres = 2.0235 hectares = 217,800 sq ft
Example 2: Residential Lot in Meters
Problem:A building lot measures 25 meters by 40 meters. Convert to acres.
Solution:Area = 25 × 40 = 1,000 sq meters\nSquare feet = 1,000 × 10.7639 = 10,763.9 sq ft\nAcres = 10,763.9 / 43,560 = 0.2471 acres\nHectares = 1,000 / 10,000 = 0.10 hectares
Result:0.2471 acres = 0.10 hectares = 10,764 sq ft
Frequently Asked Questions
How do you calculate acreage for irregular shaped land?
For irregular shaped land, there are several methods to calculate acreage. The simplest approach for rectangular or roughly rectangular plots is length times width divided by 43,560 (if measuring in feet). For triangular plots, use (base × height) / 2, then convert to acres. For irregular polygons, you can divide the land into triangles and rectangles, calculate each sub-area, and sum them. The surveyor's method uses the 'coordinate geometry' or 'shoelace formula' — given the coordinates of all corner points, the area can be precisely computed. Modern methods include GPS surveying, where you walk the perimeter with a GPS device, and the software calculates the enclosed area. Google Earth Pro also allows you to trace property boundaries and measure the enclosed area directly.
References
Reviewed by Manoj Kumar, Mathematics Educator · Editorial policy