PEN Calculator — ROX Tools
Free ROX P.PEN & M.PEN calculator: your real penetration %, how much PEN or Final PEN for your target, and the best mix. Verified in-game.
Frequently asked questions
What does PEN do?
It cancels the opponent's DEF on your non-crit hits; above their DEF, every % becomes damage. It does not count on critical hits.
PEN or Final PEN?
Each point of PEN is worth a little less than the previous one; Final PEN is always worth the same. The calculator compares both for your sheet.