The authority on pistol and rifle loading data since 1996.

Foot Pounds of Energy Calculations Find out power delivered to target


You can calculate variables in the Foot Pound formula with this page. You put in bullet weight (in grains) and speed ( in feet per second ) and click for Foot Pounds of Energy delivered at muzzle. You can see if heavier bullets for game really have more knock-down power. Sometimes the heavier bullet is so much slower, it’s not more, but less. Find out this way. The formula is Energy = Weight times Velocity Squared divided by 450395 (fixed constant).

Weight of Bullet Velocity in Feet Per Second (FPS)
Foot Pounds of Energy


MD Smith

MD Smith

MD Smith has had a storied career from his family broadcasting AM radio business, to his 36 year career in TV broadcasting. He is a published fiction and non-fiction writer, earned his pilots license in 1965, and is the original founder of Reload Ammo in 1996. His loads have been successfully tested and used by others for more than 25 years.

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