Capacitance Calculator – C = Q/V
Calculate capacitance, charge, or voltage using C = Q/V.
How It Works
Enter any two of capacitance (F), charge (C), or voltage (V). The calculator solves for the third using the fundamental capacitor equation C = Q/V.
Formula
C = Q ÷ V
Frequently Asked Questions
What is capacitance?
Capacitance C is the ability of a capacitor to store charge per unit voltage. C = Q/V, measured in Farads (F). Most practical capacitors are in μF or nF.
How much energy does a capacitor store?
Energy E = ½CV². A 100 μF capacitor at 12 V stores E = ½ × 0.0001 × 144 = 0.0072 J = 7.2 mJ.