Square Footage Calculator
Enter length and width below to instantly get square footage.
Square Footage
180 sq ft
How to Calculate Square Footage
Square footage = length × width.
Worked example
A room 12 ft long and 15 ft wide.
12 × 15 = 180
Square footage: 180 sq ft
Frequently Asked Questions
How do you calculate square footage?
Multiply the length by the width, both measured in feet: square footage = length × width.
How do you calculate square footage for a room measured in inches?
Convert each measurement to feet first by dividing by 12, then multiply length × width — or multiply in inches and divide the result by 144 (12²).
How do you find total square footage across multiple rooms?
Calculate the square footage of each room separately, then add all the results together.
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