Calculate area of circles, triangles, rectangles, squares, trapezoids, parallelograms, ellipses, and polygons. Perfect for students, teachers, and professionals.
A circle is a round plane figure whose boundary consists of points equidistant from a fixed center point.
Area equals pi times radius squared. Pi (π) is approximately 3.14159.
Area equals one-half times base times height. For three sides, use Heron's formula.
Area equals length times width. All angles are 90 degrees.
Area equals side squared. Special case of rectangle with equal sides.
Area equals one-half times sum of bases times height. Has one pair of parallel sides.
Area equals base times height. Opposite sides are parallel and equal.
Calculate how much flooring material you need for a rectangular room.
Determine how many plants you can fit in a circular garden bed.
Compare areas of different pizza sizes to find the best value.
Calculate how much paint you need for walls of different shapes.
Calculate surface area for pool maintenance and chemical treatment.
Calculate area of irregular fields for planting and irrigation planning.
Calculate area for circles, triangles, rectangles, squares, trapezoids, parallelograms, ellipses, and polygons.
Calculate triangles using base-height, three sides, or two sides and included angle.
See visual representations of each shape with accurate proportions based on your inputs.
Compare areas of different shapes with equivalent "size" to better understand scale.
See the exact formula used for each calculation with clear mathematical notation.
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