How to calculate square footage
Multiply length by width when both measurements are in feet.
Square feet = Length(ft) × Width(ft)
Square footage example
A room measuring 20 feet by 12 feet has an area of 240 square feet.
Frequently asked questions
How many square feet are in one square yard?
9 square feet.
Can I calculate multiple rooms?
Yes. Calculate each area separately and add the results, or use quantity for identical rooms.
Is square footage the same as volume?
No. Square footage measures area, while volume includes a third dimension.
Using this calculator effectively
The square footage calculator multiplies length by width to find rectangular area and also converts the result to other common area units. It is useful as a starting point for flooring, paint, tile and many material estimates.
Common uses
- Finding floor area for a room or rectangular space.
- Calculating wall or project area before estimating materials.
- Converting square feet into square yards or square meters.
Tips for a better estimate
- Break irregular spaces into rectangles and add the areas together.
- Use finished dimensions when estimating finish materials.
- Do not confuse square footage with linear footage or cubic volume.
Related calculations
Roof Square Footage Calculator · Tile Calculator · Flooring Calculator