Enter the total internal energy (joules) and the total mass (kg) into the calculator to determine the Specific Internal Energy.

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## Specific Internal Energy Formula

The following equation is used to calculate the Specific Internal Energy.

Es = TE / TM

Variables:

- Where Es is the Specific Internal Energy ((J/kg))
- TE is the total internal energy (joules)
- TM is the total mass (kg)

To calculate the specific internal energy, divide the internal energy by the total mass.

## How to Calculate Specific Internal Energy?

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

**Example Problem #1:**

- First, determine the total internal energy (joules). In this example, the total internal energy (joules) is measured to be 87.
- Next, determine the total mass (kg). For this problem, the total mass (kg) is calculated to be 4.
- Finally, calculate the Specific Internal Energy using the formula above:

Es = TE / TM

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

Es = 87 / 4 = 21.75 ((J/kg))

**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:

total internal energy (joules) = 5

total mass (kg) = 39

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

**Es = 5/ 39 = .128 **((J/kg))