Square Footage Calculator
Calculate square footage of rooms. Rectangle, circle, triangle, and L-shaped rooms. Add multiple rooms and get total area plus flooring cost estimate.
Total Area Summary
| Room | Shape | Square Feet | Square Meters |
|---|---|---|---|
| Room | rectangle | 120 ft² | 11.15 m² |
| Total | 120 ft² | 11.15 m² | |
Estimated cost: $420.00
Square Footage Calculator — How to Measure Room Area
Square footage (ft²) is the standard measurement for floor area in the United States. To calculate it, multiply the length by the width of a rectangular room. For a circle, use π × radius². For a triangle, use 0.5 × base × height. For L-shaped rooms, split them into two rectangles and add the areas. This calculator supports feet, meters, inches, and yards — converting everything to square feet for a consistent total. To convert square feet to square meters, multiply by 0.0929. The flooring cost estimator multiplies your total square footage by a cost per square foot (typically $2–$10 for laminate or vinyl, $5–$15 for hardwood, and $3–$8 for carpet). Always add 10% extra for waste and cuts when ordering materials.