Enter the mass before fusion (kg) and the mass after fusion (kg) into the calculator to determine the Fusion Energy.

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## Fusion Energy Formula

The following equation is used to calculate the Fusion Energy.

E = (m1-m2)*c^2

Variables:

- Where E is the Fusion Energy (Joules)
- m1 is the mass before fusion (kg)
- m2 is the mass after fusion (kg)
- c is the speed of light (299792458 m/s)

To calculate the fusion energy, multiply the change in mass by the speed of light squared.

## How to Calculate Fusion Energy?

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

**Example Problem #1:**

- First, determine the mass before fusion (kg). In this example, the mass before fusion (kg) is measured to be .00000012.
- Next, determine the mass after fusion (kg). For this problem, the mass after fusion (kg) is calculated to be .00000008.
- Finally, calculate the Fusion Energy using the formula above:

E = (m1-m2)*c^2

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

E = (.00000012-.00000008)*299792458^2 = 3595020714.95 (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:

mass before fusion (kg) = 50

mass after fusion (kg) = 20

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

E = (50-20)*299792458^2 = 2.69 e+18** **(Joules)