Area Calculator

Calculate the area of geometric shapes

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Select a Shape:

Rectangle Inputs:

Length Width

How to Use This Area Calculator

Our area calculator helps you quickly calculate the area of common geometric shapes.

1. Select a Shape

Choose from rectangle, right triangle, oblique triangle, trapezoid, circle, or parallelogram.

2. Enter Dimensions

Input the required measurements for your selected shape. The calculator accepts decimal values.

3. View Results

The area is calculated instantly along with the formula used.

Formulas Used

  • Rectangle: Area = Length × Width
  • Right Triangle: Area = ½ × Base × Height
  • Oblique Triangle: Area = ½ × Base × Height
  • Trapezoid: Area = ½ × (Base₁ + Base₂) × Height
  • Circle: Area = π × Radius²
  • Parallelogram: Area = Base × Height