Spherical Capacitor Calculator

Your details

Choose what quantity to solve for.
Radius of the inner conducting sphere.
Radius of the outer conducting shell.
Material filling the gap between the two shells. Relative permittivity multiplies the capacitance.
Capacitance (C)
11.1265 pF

Capacitance of the spherical capacitor

Capacitance (F)0F
Relative permittivity1
Capacitance (F)0

Capacitance: 11.1265 pF (11.1265 pF)

  • The radii ratio b/a is 2.000. As this ratio approaches 1 (thin gap), capacitance increases sharply.
  • A spherical capacitor stores charge proportional to its capacitance: Q = C * V. At 100 V and 11.13 pF, Q = 1112.65 pC.

Next stepUse the electric field mode to check that the field at the inner surface stays below the dielectric breakdown strength of your fill material.

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