Enter the inductance (Henries, h) and the current (amps) into the calculator to determine the Magnetic Energy.

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## Magnetic Energy Formula

The following equation is used to calculate the Magnetic Energy.

Em = .5 * L * I ^2

Variables:

- Where Em is the Magnetic Energy (Joules)
- L is the inductance (Henries, h)
- I is the current (amps)

To calculate the magnetic energy, multiply the inductance by the current squared, then divide by 2.

## How to Calculate Magnetic Energy?

The following two example problems outline the steps and information needed in order to calculate the Magnetic Energy.

**Example Problem #1:**

- First, determine the inductance (Henries, h). In this example, the inductance (Henries, h) is measured to be 10.
- Next, determine the current (amps). For this problem, the current (amps) is calculated to be 2.
- Finally, calculate the Magnetic Energy using the formula above:

Em = .5 * L * I ^2

Inserting the values from above and solving the equation with the imputed values gives:

Em = .5 * 10 * 2 ^2 = 20 (Joules)

**Example Problem #2: **

Using the same process as example problem 1, we first define the needed variables outlined by the formula. In this case, the values are provide as:

inductance (Henries, h) = 20

current (amps) = 3

Entering these values into the formula or calculator above gives us::

Em = .5 *20*3 ^2 = 90 (Joules)