Square Footage Calculator

Calculators to estimate the square footage of a lot or house. Please select the appropriate shape of the property and modify the values to use. If the property is very complex in shape, you probably can cut it into a few simple shapes add the square footage of these simple shape together to get the total value.

Rectangle

length:
edge:

Triangle

edge 1:
edge 2:
edge 3:

Trapezoid

top edge:
bottom edge:
left side:
right side:

Circle

radius:

Reference:

1 acre = 43,560 square foot
1 square yard = 9 square foot
1 square meter = 10.76 square foot
1 square inch = 0.00064516 square foot