Instantly calculate the area (square footage) of any shape β rectangles, circles, triangles, trapezoids, sectors and more. Include optional price estimation.
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Unit conversions and area formulas for common shapes.
1 acre = 43,560 sq ft
1 sq yard = 9 sq ft
1 sq meter β 10.764 sq ft
1 sq inch = 1/144 sq ft
Multiply length by width to find the area. Multiply by quantity for multiple rooms.
Square the radius (half diameter) and multiply by Ο (β 3.14159).
Uses Heron's formula to calculate area from three known side lengths.
Average the two parallel bases and multiply by the height between them.
Fraction of a circle's area based on the central angle in degrees.
Calculate how much hardwood, laminate, tile or carpet you need. Add 5β10% extra for waste and cuts.
One gallon of paint covers 200β400 sq ft. Calculate total wall area (subtract windows and doors) to estimate paint needed.
Determine how much sod, seed, mulch or fertilizer you need based on the total lawn area in square feet.
Estimate material costs for decks, patios, driveways, and foundations using accurate square footage.