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BULLET ENERGY CALCULATOR.

Calculate muzzle energy from bullet weight and velocity. Enter your measurements below to see the result in foot-pounds.

CALCULATE YOUR MUZZLE ENERGY

Enter your bullet weight in grains and muzzle velocity in feet per second (FPS) below. The calculator will instantly display the estimated energy in foot-pounds (ft-lbs) as you change the numbers. No button to press, just enter your values and see the result.

E = ½mv2
MUZZLE ENERGY / FOOT-POUNDS
CALCULATED MUZZLE ENERGY—

Energy (ft-lbs) = bullet weight (grains) × velocity² (ft/s) ÷ 450,395. Approximate reference only; actual performance varies with firearm and conditions.

Results are rounded to the nearest whole foot-pound.

Prefer the original compact version? Open the small calculator.