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Area Calculator

Free area calculator. Calculate the area of rectangles, circles, triangles, trapezoids, and more shapes.

Rectangle: A = Length × Width

Circle: A = π × r² (where r is the radius)

Triangle: A = ½ × Base × Height

How do I calculate the area of an irregular shape? ▼

Break irregular shapes into simpler shapes (rectangles, triangles), calculate each area separately, then add them together.