In Kung Fu Warrior, power levels are noted by letter grades. The following is a list of all the letter rank power levels:
A Grade: Individuals with A grade power level are very powerful and are considered the highest rank in power.
B Grade: Individuals with B grade power levels are considered powerful and are the second highest rank in power.
C Grade: Individuals of C grade power levels are somewhat powerful and are the third highest rank in power.
D Rank: Individuals of D grade are considered the weakest within the Kung Fu Warrior universe.