Enter the surface tension force (N) and the change in surface area (m^2) into the calculator to determine the Surface Energy.

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## Surface Energy Formula

The following equation is used to calculate the Surface Energy.

SE = Fst * dA

Variables:

- Where SE is the Surface Energy (N*m^2)
- Fst is the surface tension force (N)
- dA is the change in surface area (m^2)

To calculate the surface energy, divide the surface tension force by the change in surface area.

## How to Calculate Surface Energy?

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

**Example Problem #1:**

- First, determine the surface tension force (N). In this example, the surface tension force (N) is measured to be 5.
- Next, determine the change in surface area (m^2). For this problem, the change in surface area (m^2) is calculated to be 4.
- Finally, calculate the Surface Energy using the formula above:

SE = Fst * dA

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

SE = 5 * 4 = 20 (N*m^2)

**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:

surface tension force (N) = 6

change in surface area (m^2) = 4

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

**SE = 6* 4 = 24 **(N*m^2)