Square Footage Calculator
Calculate area in square feet, square meters, or acres. Perfect for flooring, painting, landscaping, and real estate.
How to Calculate Square Footage
Rectangle: Length x Width. Circle: pi x r2. Triangle: 0.5 x base x height. Trapezoid: 0.5 x (top + bottom) x height.
Common Conversions
- 1 sq ft = 0.0929 sq m | 1 sq m = 10.764 sq ft
- 1 acre = 43,560 sq ft | 1 acre = 4,047 sq m
Cost by Square Foot
- Hardwood flooring: $8-15/sq ft | Carpet: $3-7/sq ft | Tile: $10-25/sq ft
- Interior paint: $2-6/sq ft (walls) | Sod: $0.30-0.80/sq ft
Measuring Irregular Shapes
Break the area into simple shapes, calculate each, then add together. For an L-shaped room, split into two rectangles.
Area Results
Square Feet
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Square Meters
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Acres
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