I just made a joule converter in Excel.
I was always calculating it long hand from the BB weight and the FPS so, I decided to make this for my BlackBerry and I wanted to share with those who wanted it.
For those curious, the calculation is this,
.5 * (BB WEIGHT / 1000 kilograms) * (FPS * .3048 MPS) ^2
.5 * (BB WEIGHT / 1000 kilograms) * MPS ^2
Thanks for your time, have a good day.