Square Footage Calculator — Area of a Room
Add up the square footage (and square metres) of one or more rooms, with an optional total cost per square foot. Free, in your browser.
🔒 Calculated in your browser — nothing is uploaded.
Total area, room by room
Enter the length and width of each room or area and the tool sums them into total square feet and square metres. Add as many areas as you like — L-shaped rooms are just two rectangles. Enter a price per square unit to also get a total cost for flooring, carpet or tiling.
Feet or metres
Switch the unit and enter measurements in the system you’re working in; both the ft² and m² totals are always shown. Everything is calculated in your browser — nothing is uploaded.
Frequently asked questions
How do I calculate square footage?
Multiply length by width for each rectangular area and add them up. For odd shapes, split them into rectangles — this tool sums multiple areas for you.
How do I convert square feet to square metres?
Divide square feet by 10.764. The tool shows both totals at once, so you don’t need to convert by hand.