Square Footage Calculator

Whether you're tiling a floor, seeding a lawn, or estimating wallpaper, it's important to figure square footage of the area. Use our easy square footage calculator for your planning or remodeling needs.

Wondering how to calculate square footage? Never guess again. Square footage is an area calculated by square feet. Our easy square foot calculator helps you get the answer in no time. Simply input the measurements of your room into our easy square footage calulator, below.

After you've finished calculating square feet, use the measurement to estimate the cost of flooring, tile, landscaping, and more.

For a Square or Rectangle   Length of the room ft. Width of the room ft.

 

Square footage in a square or rectangle sq. ft.   .................................................. For a Triangle   Length of the base, in feet inches Length of the height, in feet ft.

 

Square footage for a triangle sq. ft.   .................................................. For a Circle   Length of the radius ft.

 

Square footage for a circle sq. ft.

Please note: For your convenience, this square footage calculation has been rounded up slightly.

Important reminder: Every effort has been made to ensure the accuracy of this square footage calculation. But before purchasing materials for any project, please check amounts with your suppliers or contractors.

Square Footage Calculator Information

A few tips: If an area is rectangular, the square footage calculation is simple: Round each measurement up to the nearest foot or half foot. Then, multiply length times width. For triangular and circular areas, the square footage calculation is typically more complicated.

To figure the area of a circle, multiply 3.14 (pi) times the square of the radius (the distance from the center of the circle to the circle's outside edge or circumference). To figure the area of a right triangle (that is, a triangle with one 90-degree angle), multiply 0.5 times the base (the short line attached to the right angle) times the height (the long line attached to the right angle). Or, just fill in the blanks above. If an area is irregularly shaped, divide it up into rectangles and right triangles as precisely as possible. Figure the area of each rectangle or triangle, and add up all the figures.

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