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Last Updated: April 12, 2026
Square Footage Calculator
Calculate area for one or multiple rooms. Optionally estimate material cost.
How to Measure Square Footage
- Measure the length and width of the room in feet (or meters).
- Multiply length × width to get the area.
- For L-shaped or irregular rooms, break into rectangles, calculate each, and add.
- Add 10% extra for material waste when ordering flooring.
Conversion Reference
| From | To | Multiply by |
| sq ft | sq m | 0.0929 |
| sq m | sq ft | 10.764 |
| sq ft | sq in | 144 |
| acres | sq ft | 43,560 |
Frequently Asked Questions
How do you calculate square footage?
Multiply length × width. A 12×10 room = 120 sq ft.
How many sq ft is a 12×12 room?
144 square feet.
How to convert sq ft to sq m?
Multiply by 0.0929. 500 sq ft = 46.45 sq m.