Foot-Pounds Energy (FPE) Calculator

Formula

The formula to calculate Foot-Pounds Energy (FPE) is:

\[ FPE = \frac{V^2 \times W}{450240} \]

Where:

\(FPE\) is the foot-pounds of energy
\(V\) is the velocity of the projectile (ft/s)
\(W\) is the weight of the projectile (grains)

What is Foot-Pounds Energy (FPE)?

Foot-Pounds Energy (FPE) is a measure of the kinetic energy contained in a projectile. It is calculated using the velocity and weight of the projectile. This metric is commonly used in ballistics to understand the impact energy of a projectile.

Example Calculation 1

Let's assume the following values:

Velocity (V) = 3000 ft/s
Weight (W) = 150 grains

Using the formula:

\[ FPE = \frac{3000^2 \times 150}{450240} = 3000 \text{ foot-pounds} \]

The Foot-Pounds Energy is 3000 foot-pounds.

Example Calculation 2

Let's assume the following values:

Velocity (V) = 2500 ft/s
Weight (W) = 200 grains

Using the formula:

\[ FPE = \frac{2500^2 \times 200}{450240} = 2777.78 \text{ foot-pounds} \]

The Foot-Pounds Energy is 2777.78 foot-pounds.