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Calculator for Total Capacitance of a Circular Capacitor, including edge effect

The total capacitance of a circular parallel plate capacitor including edge effect, can be calculated using the following formula.

[Circular capacitor formula]

Where r is the Radius in mm

εr is the Relative Dielectric Constant

d is the Dielectric thickness in mm

d << r

The calculator can be used to check results obtained with the Accurate Method for Measuring Relative Dielectric Constant of a PCB Using a Vector Network Analyser


Enter the value of εr
Enter the radius of the circle:   mm Total Capacitance:   pF
Enter the thickness of the dielectric:   mm

This calculator uses Visual Basic and will work in Internet Explorer and other browsers with Visual Basic plug-ins. For more information see About our calculators. A further simple Calculator for total capacitance of a circular capacitor, including edge effect is available in JavaScript. 

The calculator uses the equation above, derived from Kirchhoff's formula for a circular capacitor

This calculator is provided free by Chemandy Electronics in order to promote the FLEXI-BOX

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