Learning Mission

Multi-Shape Area Calculator

Choose a 2D shape, enter its measurements, and see the area formula, diagram, square units, and step-by-step solution.

Works as a square area calculator, rectangle area calculator, triangle area calculator, circle area calculator, and more.

What does area mean? Area tells how much flat space a 2D shape covers. If length is measured in cm, area is measured in square centimeters, written as cm2.

Input fields change automatically for the selected shape.

ShapeSquare
Area25 cm2
Square unitcm2
A = s2Area of a square equals side times side.
Step-by-step solution

    Useful area calculators in one tool

    Switch shapes to practice common school geometry formulas without opening a separate calculator each time.

    square area calculatorrectangle area calculatortriangle area calculatorcircle area calculatortrapezoid area calculatorellipse area calculator

    How to think about area

    Counting squares

    Area can be imagined as counting how many tiny unit squares cover a flat shape.

    Base and height

    Many formulas use base times height because they compare the shape to a rectangle.

    Curved shapes

    Circles, semicircles, and ellipses use pi because their boundaries are curved.