Enter the voltage (volts), the resistance (ohms), time (seconds), and the capacitance (Farads) into the calculator to determine the Capacitor Charge Current.

## Capacitor Charge Current Formula

The following formula is used to calculate the Capacitor Charge Current.

I = V / R * e ^{- (t/(RC))}
• Where I is the Capacitor Charge Current (amps)
• V is the voltage (volts)
• R is the resistance (ohms)
• C is the capacitance (Farads)
• t is the time (charge)

To calculate the capacitor charge current, divide the voltage by the resistance, then multiply by e to the power of the time over the resistance times capacitance.

## How to Calculate Capacitor Charge Current?

The following example problems outline how to calculate Capacitor Charge Current.

Example Problem #1

1. First, determine the voltage (volts). In this example, the voltage (volts) is determined to be 15 .
2. Next, determine the resistance (ohms). For this problem, the resistance (ohms) is measured to be 10 .
3. Next, determine the capacitance (Farads). In this case, the capacitance (Farads) is found to be 6.
4. Next, determine the time. For this problem, the time is 5 seconds.
5. Finally, calculate the Capacitor Charge Current using the formula above:

I = V / R * e ^ 1 – (t/(RC))

Inserting the values from above and solving yields:

I = 15 / 10 * e ^- (5/(10*6)) = 1.380 (amps)

Example Problem #2

Using the same method as above, determine the variables required by the formula. For this example problem, these are:

voltage (volts) = 20

resistance (ohms) = 15