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Radius to Circumference of Circle Calculator


Calculate Circumference of Circle
Radius (r) [?]
Circumference (C) [?]

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✕ clear settings

Switch tool with the current settings for radius, and calculate circle area, circle diameter, sphere volume or sphere surface area instead


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Contents

  • Related Tools
  • User Guide
    • Formula
      • Symbols
    • Radius of Circle
    • Circumference of Circle

Related Tools

  • Calculate radius of circle from circumference
  • Circle area calculator using radius
  • Circle diameter calculator using radius
  • Length and distance converter
  • Sphere volume calculator using radius
  • Sphere radius to surface area calculator

User Guide

This tool will calculate the circumference of a circle from the radius, and will convert different measurement units for radius and circumference.

Formula

The formula used to calculate circle circumference is:

C = 2 · π · r

Symbols

  • C = Circle circumference
  • π = Pi = 3.14159…
  • r = Circle radius

Radius of Circle

Enter the radius of a circle. The radius is the distance between the centre and any point on the outer edge of a circle.

Circumference of Circle

This is the total length of the edge around the circle with the specified radius, if it was straightened out.

Primary Sidebar

Tool Sections

  • Area
  • Chemical Quantities
  • Circular Shapes
  • Density
  • Diameter & Radius
  • Energy & Power
  • Electrical & Electromagnetic
  • Flow
  • Force, Load & Torque
  • Length & Distance
  • Liquid Depth & Level
  • Mass & Weight
  • Movement & Motion
  • Pressure
  • Pricing & Quantities
  • Rectangular Shapes
  • Sensors & Instruments
  • Speed & Acceleration
  • Temperature & Heat
  • Time & Frequency
  • Travel & Transportation
  • Volumetric

Tool Feedback

Please provide feedback on using this Radius to Circumference of Circle Calculator.

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