Square Footage Calculator
Calculates area in square feet for rectangles, triangles, circles, and irregular shapes
Select the shape to calculate area for
Length of the rectangle in feet
Width of the rectangle in feet
Total area in square feet
Total area converted to square meters
Total area converted to acres
Frequently Asked Questions
How do I calculate square footage of a room?
For a rectangular room, multiply the length by the width in feet. For example, a 12 x 15 foot room is 180 square feet. For irregular shapes, break the room into rectangles, calculate each, and add them together.
How do I convert square feet to square meters?
Multiply square feet by 0.0929 to get square meters. For example, 1,000 square feet equals about 92.9 square meters. To convert back, multiply square meters by 10.764.
How many square feet are in an acre?
One acre equals 43,560 square feet. That is roughly the size of a football field without the end zones. A quarter-acre lot, common in suburban neighborhoods, is about 10,890 square feet.
How do I calculate the square footage of a circle?
Use the formula: area = pi times radius squared. Measure the radius in feet (half the diameter), square it, and multiply by 3.14159. A circular patio with a 10-foot radius has an area of about 314 square feet.
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