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TOOLS > Time Constant Calculator

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.

Input

picofarad

Nanofarad

Microfarad

Output

Time Constant ()

Energy (E)