Calculate the floor area of one or more rooms and the total built-up area - add a row for each room in your house or building.
How to Use the Room Area Calculator
Enter a "Room Name" (optional), "Length", and "Width" for each room.
Use "Add Room" to add more rows, or the × button to remove one.
Click "Calculate Total Area" to see each room's area and the total built-up area, in both square meters and square feet.
Frequently Asked Questions
No, this calculates carpet area (the usable internal floor area) based on the length and width you enter. It doesn't add wall thickness, which is factored into "built-up area" or "super built-up area" figures used by builders.
This calculator assumes rectangular rooms. For L-shaped or irregular rooms, split the space into rectangular sections, add each as a separate row, and the total will still be accurate.
1 square meter equals approximately 10.7639 square feet, which is the conversion factor used here.
Yes, it's completely free and requires no sign-up.