Area Calculator
Calculate area and perimeter of rectangles, squares, triangles, circles, trapezoids, parallelograms, and ellipses. Free online area calculator.
A = length × width
Area Formulas Reference
Rectangle: A = l × w
Square: A = s²
Triangle: A = ½bh
Circle: A = πr²
Trapezoid: A = ½(a+b)h
Parallelogram: A = bh
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