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`E_k = 1/2 "m" "v" ^2`

Enter a value for all fields

The **Muzzle Energy of a Projectile** formula is used to calculate the energy produced by a bullet immediately after leaving the barrel given the bullet's mass and velocity.

**INSTRUCTIONS:** Choose units and enter the following:

- (
**m**) Bullet's Mass - (
**v**) Muzzle Velocity

**Muzzle Energy (E _{k}):** The energy is returned in feet pounds (ft_lbf). However, this can be automatically converted to compatible units via the pull-down menu.

Muzzle energy is the amount of kinetic energy produced by a projectile at the moment it leaves the barrel. This is used to get an idea for how powerful a cartridge is and is a value often needed in shooting and hunting sports. For instance, the state of Maryland hunting regulations use muzzle energy to determine a weapon's suitability for hunting deer. They require a rifle to produce at last 1,200 foot pounds muzzle energy to be legal for deer hunting to ensure a quick and humane harvest.

The formula for Kinetic Energy is as follows:

**where**:

- KE is the kinetic energy
- m is the mass of the object
- v is the velocity

**Sectional Density**: Computes the factor used in the computation of the ballistic coefficient called sectional density.**Bullet Ballistic Coefficient**: Computes factor that represents a bullet's ability to overcome air resistance in flight.**Ballistic Coefficient from Bullet's Mass, Diameter and Form Factor**: Estimates the ballistic coefficient from the mass, diameter and form factor**Miller Twist Rule**: Computes the optimal barrel twist rate for stabilizing a bullet's flight given the bullet's diameter, length and mass.**Taylor Knock-out Factor**: Calculates a factor indicating the power of a round,.**Greenhill Formula for Optimal Rifling Twist Rate**: calculate the optimal barrel twist rate for stabilizing a bullet's flight given the bullet's diameter, length, specific gravity and velocity.**Bullet Flight Range**: Computes the maximum range (horizontal distance) traveled by a bullet based on the muzzle velocity, elevation angle and shooter height.**Muzzle Energy of a Projectile**: Calculates the kinetic energy in a bullet immediately after leaving the barrel given the bullet's mass and velocity.**Recoil Velocity of a Gun**: Computes the velocity at which a gun will move in the opposite direction in relation to the projectile that it fired.**Cost per Round**: Computes cost per round of ammunition based on the cost of a container of cartridges and the number of rounds in the container.**Rifle Sight Correction Angles**: Computes the Minutes of Angle corrections for rifle sights.**Shotgun Shell Reloading Cost**: Computes the cost to reload used shotgun shells (hulls) with powder, shot, wads and primers.**Shotgun Shell Loading Cost**: Computes the cost to load new pre-primed shells (hulls) with power, shot and wads.**Metal Ball Weight**: Computes the mass (weight) of a spherical metal (e.g., steel) ball based on the size (diameter).**Metal Cylinder Weight**: Computes the mass (weight) of a metal cylinder based on the size (diameter and length).