Square Footage Calculator
Square footage is length times width. Enter a room’s dimensions in feet to get its area — and multiply across several identical rooms at once. Flooring, paint and material estimates all start here.
Your numbers
Result
- Per areasq ft
- 120
- In square metersm²
- 11.15
| Item | Value |
|---|---|
| Per area (L × W) | 120.00 sq ft |
| Number of areas | 1 |
| Total square footage | 120.00 sq ft |
| In square meters | 11.15 m² |
How to calculate square footage
Multiply length by width in feet: a 12 ft × 10 ft room is 120 sq ft. For several identical areas, multiply by how many there are. If a room is not a simple rectangle, split it into rectangles, find each area, and add them — an L-shaped room is just two rectangles.
Measuring in feet and inches
Convert inches to a decimal of a foot before multiplying: 6 inches is 0.5 ft, 3 inches is 0.25 ft. So a wall that is 10 ft 6 in is 10.5 ft. Getting this right matters — an inch off on every wall adds up across a whole floor.
How much extra to buy
Square footage is the starting number, not the amount to purchase. Flooring, tile and paint all need a waste allowance (typically 5–10%) for cuts, breakage and mistakes, and some patterns need more. Work out the area here, then add the overage the material calls for.
Frequently asked questions
Sources
- Area measurement (length × width)
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