Circle Area Calculator

The circle area calculator calculates the area of a circle by taking its radius as input.

How to use Circle Area Calculator

Enter ✎ value for radius \((r)\).
The result appears beneath the inputs as you enter values.

About this calculation

The area of a circle is defined as the area enclosed in the circular shape.

Formula

To calculate the circle area, you can use the following formula.

Area = \(π r ^2\)

where

Calculation

{
  "topic": "circle-area",
  "img": {
    "width": 246,
    "height": 246
  },
  "input_types": [
    "float"
  ],
  "input_labels": [
    "r"
  ],
  "input_values": [
    "8"
  ],
  "input_units": [
    "units"
  ],
  "input_descriptions": [
    "radius"
  ],
  "examples": [
    {
      "r": 5
    },
    {
      "r": 1
    }
  ],
  "type": "Calculate",
  "title": "Circle Area",
  "category": "Geometry",
  "shape": "Circle",
  "formula_mathjax": "\\(π r ^2\\)",
  "formula_mathjax_sub": "\\(π \\times r ^2\\)",
  "formula": "Math.PI * ( r ** 2)",
  "op_label": "Area",
  "output_unit": "square units",
  "description": "The circle area calculator calculates the area of a circle by taking its radius as input.",
  "explanation": "The area of a circle is defined as the area enclosed in the circular shape."
}