Enter the output voltage (volts), the input voltage (volts), the inductance (H), and the switching frequency (Hz) into the calculator to determine the Ripple Current.

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## Ripple Current Formula

The following formula is used to calculate the Ripple Current.

**Iripple = Vo / Vi * (Vi-Vo)/ (Fs*L)**

- Where Iripple is the Ripple Current (amps)
- Vo is the output voltage (volts)
- Vi is the input voltage (volts)
- Fs is the switching frequency (Hz)
- L is the inductance (H)

## How to Calculate Ripple Current?

The following example problems outline how to calculate Ripple Current.

**Example Problem #1**

- First, determine the output voltage (volts). In this example, the output voltage (volts) is determined to be 10 .
- Next, determine the input voltage (volts). For this problem, the input voltage (volts) is measured to be 50 .
- Next, determine the switching frequency (hz). In this case, the switching frequency (hz) is found to be 2.
- Next, determine the inductance. In this case, this is 4H.
- Finally, calculate the Ripple Current using the formula above:

Iripple = Vo / Vi * (Vi-Vo)/ (Fs*L)

Inserting the values from above and solving yields:

Iripple = 10 / 50 * (50-10)/ (2*4) = 1 (amps)

**Example Problem #2**

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

output voltage (volts) = 4

input voltage (volts) = 23

switching frequency (hz) = 5

inductance (H) = 3

Enter these given values into the calculator or above yields:

Iripple = 4 / 23 * (23-4)/ (5*3) = .2202 (amps)