Capacitor Energy and Time Constant Calculator

This calculator computes the energy in a capacitor, given the voltage across it.

If you specify a load resistor it will also compute the time constant, or the time until the voltage drops to 37%, or charges to 63%.

Voltage across capacitor	(V)
Capacitance	(uF)
Load Resistance (Optional)	(Ohms)
Result
Energy	(Joules)
Time Constant	(seconds)

See our standard resistor calculator for a real world resistor value.

Equations:

E= V^2*C/2

TC= R*C

1/e = 36.8%