- Volume Calculator
- Area Calculator
- Perimeter Calculator
- Surface Area Calculator
- Circle Calculator
- Rectangle Calculator
- Triangle Calculator
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Square Feet to Square Yards ConverterConvert square feet to square yards instantly. Divide ft² by 9 to get yd². Free, accurate area converter for flooring, carpet, and landscaping projects.
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Roof Area CalculatorCalculate the true surface area of a pitched roof from building footprint and pitch (rise/run). Get square feet and roofing squares instantly.
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Square Feet to Square Inches ConverterConvert square feet to square inches instantly. Just multiply by 144. Fast, accurate area unit converter with formula and worked examples.
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Stadium CalculatorCalculate the area and perimeter of a stadium (discorectangle) shape from its radius r and straight side length a. Free geometry calculator.
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Sod CalculatorFree sod calculator: enter your lawn length, width, waste %, and roll coverage to find total square feet, square yards, and rolls of sod needed.
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Regular Polygon CalculatorCalculate the area, perimeter, apothem, circumradius and angles of any regular polygon from its number of sides and side length.
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Rhombus CalculatorFree rhombus calculator. Enter the two diagonals to find the area, side length and perimeter instantly using area = (d₁×d₂)/2.
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Isosceles Triangle CalculatorCalculate the area, altitude, perimeter, base angles and vertex angle of an isosceles triangle from its equal side length and base.
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Parallelogram CalculatorCalculate the area and perimeter of a parallelogram from its base, height, and side. Free, instant geometry calculator with formulas and examples.
