Enter the projectile mass (grains) and the projectile velocity (ft/min) into the calculator to determine the Projectile Energy.

## Projectile Energy Formula

The following equation is used to calculate the Projectile Energy.

**Ep = mp * Vp^2 / 450437**

Variables:

- Where Ep is the Projectile Energy ((foot-pounds))
- mp is the projectile mass (grains)
- Vp is the projectile velocity (ft/min)

## How to Calculate Projectile Energy?

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

**Example Problem #1:**

- First, determine the projectile mass (grains). In this example, the projectile mass (grains) is measured to be 8.
- Next, determine the projectile velocity (ft/min). For this problem, the projectile velocity (ft/min) is calculated to be 5.
- Finally, calculate the Projectile Energy using the formula above:

Ep = mp * Vp^2 / 450437

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

Ep = 8 * 5^2 / 450437 = .000444 ((foot-pounds))

**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:

projectile mass (grains) = 6

projectile velocity (ft/min) = 7

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

**Ep = 6 * 7^2 / 450437 = .000652 **((foot-pounds))