Reference Designer Calculators
RC Time Constant Calculator
If a voltage is applied to a capacitor of Value C through a resistance of value R, the voltage across the capacitor rises slowly. The time constant is defined as the time it will take to charge to 63.21% of the final voltage value.
Following is the formula for time constant.
t = R * C
Enter two of the required values and Hit the third button to calculate the required value. You may also choose the suitable units.