Free tool · Estimating & costing
Square Footage Calculator
Enter a width and length to get the area in square feet and square meters, and add a price per square foot for countertops, panels, or finishes.
Measure each rectangle of an L-shaped counter or room as its own section and add them up. For slab material you pay for the full area, so cutouts stay in the total as waste.
Square Footage Calculator, explained
How do you calculate square footage?
Square footage is width times length, with both measured in feet. If your measurements are in inches, divide each by 12 before multiplying, or measure in feet directly. For example a countertop 8 feet long and 25 inches deep is 8 x (25 / 12) = about 16.7 square feet.
Countertops, panels, slab goods, and finishes are quoted by the square foot, so multiply the area by the price per square foot for a material cost. This calculator accepts feet, inches, or centimeters, and returns the area in both square feet and square meters along with the cost, so you can budget a job in whatever units your supplier uses.
How it works
How the Square Footage Calculator works.
Square feet = width (ft) x length (ft) | Cost = square feet x price per square foot - Choose your input unit: feet, inches, or centimeters.
- Enter the width and the length.
- Add a price per square foot to get the cost (optional).
- Read the area in square feet and square meters, and the cost.
Example: a countertop 96 inches by 25 inches is about 16.7 square feet. At $60 per square foot that is roughly $1,000 in material.
Square Footage Calculator FAQ
Square Footage Calculatorquestions.
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How do I calculate square feet from inches?
Divide each measurement by 12 to get feet, then multiply width by length. Or multiply the two inch measurements and divide by 144, since there are 144 square inches in a square foot.
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How many square feet is a 4x8 sheet?
A 4 by 8 foot sheet is 32 square feet (4 x 8). That is the full nominal area before any cutting waste.
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How do I convert square feet to square meters?
Multiply square feet by 0.0929. For example 100 square feet is about 9.29 square meters.
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