File:Change in dmg red from armor against lvl 83 bosses.png

Summary
This graph shows damage reduction gained by each point of armor from 30k to 50k armor vs a level 83 boss.

Example: going from 30,000 to 30,001 armor points will increase your damage reduction by armor by 0.00765%. Going from 45,000 to 45,001 armor will increase your damage reduction by 0.00438%.

Note that the Y axis on this graph is not in percentages. (Meaning, 0.00001 on the y axis is 0.001%. Multiply by 100 to get your percentage value.)

Also realize that the armor cap is at 75%, so anything over 49,905 armor is useless.

Thanks to gcalc.net, a great online graphic tool.