Square Footage Calculator
This free calculator estimates the square footage of a property and can account for various common lot shapes.

What Square Footage Calculator does
The Square Footage Calculator on Calculator.net determines the area of a lot, house, or other surfaces in several common shapes. Users can compute square footage for rectangles, circles, and triangles by entering dimensions in feet, yards, inches, miles, meters, kilometers, or centimeters. The tool also includes optional price fields per unit of area, allowing users to estimate material costs alongside the total space. For complex surfaces, the calculator notes that sections can be measured separately and their footages added together. The result provides the total square footage based on the entered geometry.
How to use the Calculator.net Square Footage Calculator
- 1
Select the shape type from the available options (Rectangle, Circle, or Triangle)
- 2
Enter the required dimensions in the chosen units (e.g., length and width for a rectangle, diameter for a circle, or edge lengths for a triangle)
- 3
Include optional price per unit of area if estimating material costs
- 4
View the calculated total square footage and cost breakdown displayed on screen
Best for
Homeowners, builders, and DIY enthusiasts who need quick, accurate area measurements for construction planning, material estimation, or property assessment without manual calculations.
Limitations
- Results depend on the accuracy of user-entered dimensions
- No unit conversion or switching after initial input
- Complex or highly irregular shapes may require manual sectioning for accurate totals
Square Footage Calculator FAQ
- Can I calculate square footage for an L-shaped room?
- Yes, the tool allows you to section the area into simpler shapes like rectangles and triangles, calculate each separately, and add the results together for the total square footage.
- Does the calculator support metric units?
- Yes, dimensions can be entered in meters, centimeters, or other metric units, and the result will be provided in square feet or the selected unit.
- Is there a way to include material costs in the calculation?
- The calculator includes optional price fields per square foot, square yard, or other units, which can be used to estimate total material costs based on the computed area.
- What if my measurements are in inches?
- You can enter dimensions in inches, and the calculator will process the input to provide the area in square feet, or you may choose another available unit for the output.
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