Square Footage Calculator
Calculate area in square feet, square meters, or square yards. Supports rectangular, triangular, and circular shapes for irregular projects.
Inputs
Area
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Square meters
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Square yards
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Square inches
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About Square Footage Calculator
For irregular rooms
Divide the space into rectangles, triangles, and circles. Calculate each separately, then add them up. For room with alcoves, subtract the alcove area from the larger rectangle.
Common conversions
1 yd² = 9 ft² (3 ft × 3 ft). 1 m² ≈ 10.76 ft². 1 acre = 43,560 ft² ≈ 4,047 m². Useful when buying material sold in different units.
Measuring tips
Use a laser distance meter for big rooms — much faster and more accurate than a tape over long runs. For walls, measure at the floor and again at the ceiling and average if they differ (rare in modern construction but common in older homes).