The Capacitance of a Cylindrical Capacitor calculator computes the capacitance of a capacitor that has two coaxial cylindrical shells.
INSTRUCTIONS: Choose your preferred units and enter the following:
Capacitance: The capacitance (C) is returned in Farads. However, this can be automatically converted to other capacitance units via the pull-down menu.
The calculator uses the formula:
C = `2pi * epsilon_r * epsilon_0 * L/(ln "b/a")`
We're working under the assumption that the cylinders are much longer than they are wide. This equation can be derived from Gauss's Law and the relation q = CV .