Area Calculator
Calculate the area of common 2D shapes with instant unit conversions.
Rectangle Area
Area
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A = l × w
sq cm
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sq m
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sq in
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sq ft
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sq yd
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acres
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Area Formulas
Rectangle
A = length × width
Square
A = side²
Circle
A = π × r²
Triangle
A = ½ × base × height
Trapezoid
A = ½ × (a + b) × h
Ellipse
A = π × a × b
Parallelogram
A = base × height