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Capacitor Energy and Time Constant Calculator

See our other Electronics Calculators.

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%. Time constant is useful for 

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

Equations:

E= V^2*C/2

TC= R*C

1/e  = 36.8%

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