Area Calculator

Calculate area of any shape

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Full guide

How to Calculate the Area of Common Shapes

Find area for circles, rectangles, triangles, and more with formulas, units, and worked examples — free area calculator guide.

Read the guide

About Area Calculator

An area calculator that computes the area of common geometric shapes: circle, rectangle, square, triangle, trapezoid, ellipse, parallelogram, and rhombus. Shows the formula used, perimeter, and supports unit conversion between sq ft, sq m, acres, and hectares. All calculations are client-side. Essential for math students, architects, landscapers, and anyone needing quick geometry calculations.

Area Calculator Features

  • 8 shapes
  • Formula display
  • Unit conversion
  • Perimeter
  • Interactive inputs

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