Square Footage Calculator
Square footage calculator: find the area in square feet of a room from its length and width in feet or inches, for flooring, paint or rent.
Editorial review: Farrow (pseudonym; identity and professional credentials are not disclosed). This page is for educational purposes, not professional advice.
Your inputs
Results update as you type. Nothing you enter leaves your device.
Results
- Length
- 12 ft
- Width
- 10 ft
Example with the starting values
These results use the calculator's initial inputs. Change the values above to calculate your own estimate.
Inputs
- Length (feet)
- 12 ft
- Length (inches)
- 0 in
- Width (feet)
- 10 ft
- Width (inches)
- 0 in
Results
- Area
- 120 sq ft
- Length
- 12 ft
- Width
- 10 ft
How does the Square Footage Calculator work?
Square footage is length times width, both measured in feet. Area (sq ft) = length (ft) × width (ft). Inches are converted to feet first by dividing by 12.
For example, a room 12 ft 6 in long and 10 ft wide is 12.5 × 10 = 125 sq ft.
Frequently asked questions
How do I calculate square footage?
Multiply the length by the width, both in feet. A 15 ft by 20 ft room is 15 × 20 = 300 sq ft.
How do I convert inches to square footage?
Divide the inch measurement by 12 to get feet first, then multiply length by width. 8 ft 6 in becomes 8.5 ft.
How many square feet is an acre?
One acre is 43,560 square feet.
How do I find square footage for an irregular room?
Split the room into rectangles, find each one's area with length × width, then add them together.
Is this the same as a sq ft calculator for flooring?
Yes. The room square footage this area calculator feet-based input gives you works directly for flooring, paint or carpet estimates.