File:Dmg red from armor against lvl 83 bosses.png

Summary
This graph shows actual damage reduction from armor at armor values against level 83 raid bosses. Note that percentages are not on the y axis, so you have to multiply by 100 to get a percentage (if you can't handle decimals.)

Also note that armor caps at 75% damage reduction, so nothing over 49,905 armor points is worthless.

Special thanks to gcalc.net