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Circle Diameter to Circumference Calculator


Calculate Circumference of Circle
Diameter (ø) [?]
Circumference (C) [?]

Click save settings to reload page with unique web page address for bookmarking and sharing the current tool settings, or click flip tool to reverse the tool function with current settings

✕ clear settings

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


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Contents

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

Related Tools

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

User Guide

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

Formula

The formula used to calculate circle circumference is:

C = π · ø

Symbols

  • C = Circle circumference
  • π = Pi = 3.14159…
  • ø = Circle diameter

Diameter of Circle

Enter the diameter of a circle. The diameter of a circle is the length of a straight line drawn between two points on a circle where the line also passes through the centre of a circle, or any two points on the circle as long as they are exactly 180 degrees apart.

Circumference of Circle

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

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Help Guides

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  • Measuring the difference in air pressure between rooms
  • How to get a 10 volt signal from a 4-20mA output pressure sensor
  • How to Connect a 4-20mA Current Loop Pressure Transmitter
  • Determining the hydrostatic pressure range for a tank level sensor
  • Choosing PVC, PUR, FEP and TPE cable types

Online Measurement Tools

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  • Pressure Converter
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