Free tool
Square footage calculator
Measure a rectangle in feet to get its area, then add extra for waste when buying materials.
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How it works
How it works
Area = length x width. Multiple identical rectangles are added together. The waste percentage adds extra material for cuts and mistakes.
Example: a room that is 14 feet by 12 feet is 168 square feet. Adding 10% for waste gives 184.8 square feet to buy. In square yards, which carpet is sometimes sold in, 168 square feet is about 18.67. Subtract closets or add alcoves as separate areas.
FAQ
About this calculator
How do I measure an odd shape?
Split it into rectangles, measure each and add them.
How much waste should I allow?
Check the product's instructions. Patterns and diagonal layouts usually need more.
How do I convert inches?
Divide by 12. For example, 18 inches is 1.5 feet.
Is anything saved?
No. The math runs in your browser and nothing you enter is sent to us.
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