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Circle Radius to Diameter Calculator


Calculate Diameter of Circle
Radius (r) [?]
Diameter (ø) [?]

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 radius, and calculate circle area, circle circumference, sphere volume or sphere surface area instead


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Contents

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

Related Tools

  • Calculate radius of circle from diameter
  • Circle area calculator using radius
  • Circle circumference 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 diameter of a circle from the radius, and will convert different measurement units for radius and diameter.

Formula

The formula used to calculate circle diameter is:

ø = 2 · r

Symbols

  • ø = Circle diameter
  • 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.

Diameter of Circle

This is the diameter of a circle that corresponds to the specified radius. 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.

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Tool Sections

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Product Selection Guides

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Application Selection Guides

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Help Guides

  • Reduce calibration costs of analogue pressure gauges
  • 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

  • Temperature Transmitter 4-20mA Current Output Calculator
  • Pressure Transmitter 4-20mA Current Output Calculator
  • Pressure Transducer 1-5V Voltage Output Calculator
  • Pressure Converter
  • Measurement Reading to 4-20mA Signal Converter
  • Liquid Depth/Level to Hydrostatic Pressure Calculator
  • Input to Output Measurement Reading Converter
  • Force & Area to Pressure Calculator
  • Density to Specific Gravity Calculator

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