Rectangle

Rectangle Area Calculator | Length x Width with Steps

Calculate the area of a rectangle from length and width with step-by-step formula display and unit conversions.

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Triangle

Triangle Area Calculator | Base-Height, Heron\'s, SAS

Calculate triangle area using base and height, three sides (Heron\'s formula), or two sides and an included angle (SAS).

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Circle

Circle Area Calculator | From Radius with Formula

Calculate the area of a circle from its radius with the pi-r-squared formula, step-by-step solution, and unit conversions.

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Trapezoid

Trapezoid Area Calculator (Trapezium) | Parallel Sides + Height

Calculate the area of a trapezoid (trapezium) from the two parallel sides and the perpendicular height.

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Parallelogram

Parallelogram Area Calculator | Base x Perpendicular Height

Calculate the area of a parallelogram from its base and perpendicular height. Includes a reminder to use perpendicular height, not the slant side.

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Ellipse

Ellipse Area Calculator | Semi-Major and Semi-Minor Axes

Calculate the area of an ellipse from its semi-major and semi-minor axes using the formula A = pi a b.

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Regular Polygon

Regular Polygon Area Calculator | Pentagon, Hexagon, Octagon

Calculate the area of any regular polygon from the number of sides and side length. Supports triangles, squares, pentagons, hexagons, octagons, and more.

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Rhombus

Rhombus Area Calculator | From Diagonals

Calculate the area of a rhombus from its two diagonals using the formula A = 1/2 d1 d2.

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Shape

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How to Calculate the Area of Any Shape

Rechnersuche

Rechnersuche

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Shape

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Calculate Area

How to Calculate the Area of Any Shape