How to Calculate Acres From Feet

Most residential and commercial land boundaries in the US are recorded on deeds in linear feet. Converting feet into acreage requires multiplying dimensions into square feet before dividing by the constant 43,560.

Step-by-Step Method

Measure all sides in feet: Use a surveying tape, measuring wheel, or property deed plat.
Calculate area in square feet:
- For a square or rectangle: $\text{Length (ft)} \times \text{Width (ft)}$
- For a right triangle: $\frac{\text{Base (ft)} \times \text{Height (ft)}}{2}$
Divide by 43,560: $\text{Acres} = \frac{\text{Total Square Feet}}{43,560}$

Quick Reference Table

Dimensions in Feet	Square Feet	Total Acres
100 ft × 100 ft	10,000 sq ft	0.2296 acres
100 ft × 200 ft	20,000 sq ft	0.4591 acres
208.71 ft × 208.71 ft	43,560 sq ft	1.0000 acre
300 ft × 500 ft	150,000 sq ft	3.4435 acres
660 ft × 660 ft (1 furlong sq)	435,600 sq ft	10.0000 acres

Enter any custom dimensions into our Acreage Calculator for an instant readout.