Things You'll Need:
- Tape measure
- Notepad
- Pencil
- Calculator
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Step 1
Measure the floor space in feet. A 3-inch section is equivalent to 0.25 feet. Round your measurements up to the nearest 3-inch increment and convert the number to a decimal. (For example, 6 inches equals 0.50 feet and 9 inches equals 0.75 feet.)
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Step 2
Double-check your measurements, making sure your tape measure fits snugly against the wall and runs parallel to it. A slanted line will not provide an accurate measurement.
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Step 3
Write down both the length and the width of the area, including the decimal units. Multiply the width by the length on your calculator to get the square footage of the area.
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Step 4
Add together the square footage from one or more rooms to get the total number of square feet on a story or for your entire house. Areas with alcoves are best measured separately and added together to determine the overall area.











