E-rank| : possesses superhuman strength. E-rank hunters are slightly stronger than most humans
D-rank| : there is not much to be said about D-ranks other than that they're superior to E-ranks.
C-rank| : stated to be equal to a military tank both by defense and attack power.
B-rank| : it takes approximately 10 C-rank to beat an average B-rank.
A-rank| : Stronger that B-ranks, but 5 B-ranks is enough to beat an A-rank hunter.
S-rank| : Being an S-rank makes you one of the strongest humans on the planet not even a 100 A-rank hunter could defeat an S-rank hunter because becoming an S-rank is one of the most difficult tasks ever; you would have to collect and digest more than 1,000,000 monster cores.
SS-rank| : most of the S-rank hunters fit in this category. Although there is a big gap between S-rank and SS-rank, there's not much information to tell us how big of a difference other than the S-rankers sparing with each other.
SSS-rank| : This rank is the highest rank in the Hunter Ranking System. SSS-ranked hunters are the epitome of power; becoming one of the few SSS-rank hunters means you are an unstoppable force; not even a nuclear attack could scratch you.