🎯 Bullet Energy Calculator
Calculate the kinetic energy of a bullet from its weight and velocity, commonly used to compare ammunition muzzle energy.
What this calculates
A bullet’s kinetic energy at the muzzle (or at any point along its flight) is a common way to compare the power of different cartridges, based on its mass and velocity.
The formula
Kinetic energy is KE = ½mv². In the common imperial ammunition convention, energy in foot-pounds is calculated as KE(ft-lb) = (weight in grains × velocity in fps²) / 450,240, which already accounts for converting grains to slugs and unit conversions. This calculator also reports the equivalent value in joules.
This tool is for general ballistics reference and education. Always follow proper firearm safety practices; actual energy depends on the specific load and measured velocity.