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3. Geometry
4. Circle Diameter

\(r\)

(radius)

units

Diameter

units

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How to use Circle Diameter Calculator

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

About this calculation

The diameter of a circle is a straight line segment that passes through the center of the circle and has both of its endpoints on the circle's boundary. It is the longest distance that can be measured within a circle. In other words, the diameter is twice the length of the radius, which is the distance from the center of the circle to any point on its boundary.

Formula

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

Diameter = \(2 r \)

where

Calculation

{
  "topic": "circle-diameter",
  "img": {
    "width": 246,
    "height": 246
  },
  "input_types": [
    "float"
  ],
  "input_labels": [
    "r"
  ],
  "input_values": [
    "8"
  ],
  "input_units": [
    "units"
  ],
  "input_descriptions": [
    "radius"
  ],
  "examples": [
    {
      "r": 10
    },
    {
      "r": 1.5
    }
  ],
  "type": "Calculate",
  "title": "Circle Diameter",
  "category": "Geometry",
  "shape": "Circle",
  "formula_mathjax": "\\(2 r \\)",
  "formula_mathjax_sub": "\\(2 * r \\)",
  "formula": "2 * r ",
  "op_label": "Diameter",
  "output_unit": "units",
  "description": "The circle diameter calculator calculates the diameter of a circle by taking its radius as input.",
  "explanation": "The diameter of a circle is a straight line segment that passes through the center of the circle and has both of its endpoints on the circle's boundary. It is the longest distance that can be measured within a circle. In other words, the diameter is twice the length of the radius, which is the distance from the center of the circle to any point on its boundary."
}