Do you know how many fps (feet per second) you shoot? You also need to know the exact grain of you arrows. Figure...
Grain Weight X Velocity X Velocity then divide it by 450,240.

It's easy once you do it a few times...for example
You shoot 375 grain arrow at 275 fps
375 X 275 X 275=28,359,375 divided by 450,240=62.98 foot pounds of kinetic energy.

Hey look everybody I helped somebody! WOOHOO! Good luck!

Trushot }}------>