Time Constant Calculator
This tool calculates the product of resistance and capacitance values, known as the RC time constant. This figure — which occurs in the equation describing the charging or discharging of a capacitor through a resistor — represents the time required for the voltage present across the capacitor to reach approximately 63.2% of its final value after a change in voltage is applied to such a circuit. The total energy stored in a capacitor charged to a specified voltage is also calculated.
How to Calculate Time Constant:
Time constant (
) can be determined from the values of load resistance (R) and capacitance (C). Energy stored on a capacitor (E) can be determined by giving two inputs: voltage (V) and capacitance.
Energy Stored = Voltage2 x Capacitance / 2
Time Constant = Resistance x Capacitance
Input
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Formula
