Muzzle Energy Calculator
Accurately determine the kinetic energy of any projectile. Input your bullet weight and muzzle velocity to instantly calculate foot-pounds (ft-lbs) and Joules for hunting, load development, or competitive shooting.
Last updated: March 2, 2026
Whether you are testing a new handload over a chronograph or just curious about factory ammunition specs, energy is a crucial metric for understanding ballistic performance.
Common Ballistic Energy Benchmarks
How does your calculated energy compare to standard factory ammunition? Here are average benchmarks for popular cartridges fired from standard barrel lengths.
Rimfire
- .22 LR~130 ft-lbs
- .17 HMR~245 ft-lbs
- .22 WMR~320 ft-lbs
Handgun
- .380 ACP~200 ft-lbs
- 9x19mm~360 ft-lbs
- .45 ACP~400 ft-lbs
Magnum
- .357 Mag~550 ft-lbs
- .44 Mag~950 ft-lbs
- .300 BLK~1,300 ft-lbs
Big Game
- 5.56x45mm~1,250 ft-lbs
- .308 Win~2,600 ft-lbs
- .300 Win Mag~3,800 ft-lbs
Velocity is King
When looking at the formula for kinetic energy (E = ½mv²), one variable profoundly dominates the outcome: Velocity.
Because velocity is squared, slight increases in speed yield massive increases in total energy. For example, if you take a 100-grain bullet and double its weight to 200 grains, the energy exactly doubles.
However, if you take that same 100-grain bullet and double its velocity from 1,000 fps to 2,000 fps, its total kinetic energy doesn't double—it quadruples from roughly 222 ft-lbs to 888 ft-lbs. This physical reality is why lightweight, hyper-velocity rifle rounds (.223 Rem, .22-250) can produce devastating terminal effects that rival slow, extremely heavy projectiles (.45-70 Govt).
Frequently Asked Questions
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Developing a new handload? Share this tool with your hunting party or competitors to compare ballistics.
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