[TicTacOps]

Originally Posted by ThunderCactus

Or you could just do a quick google search to find one online.
There's about 5 programs you can download as well, and probably a few apps.

http://www.coderedairsoftpark.com/pa...calculator.php

Found this really good Joules/FPS calculator too (use it all the time when configuring my guns)

Also includes a joules chart that you can use to check if your gun's output is safe/legal.

Link : FPS Calculator

Hope this helps

Happy hunting