Armor

Armor has 80% physical damadge reduction cap which equalent to 567 (without a shield) displayed armor cap.

Cap base value: (567 / (1.4 * 1.25 * 1.25 * 2)) = 130

Legendary quality adds +50.

Light

• Elven: 35 + 8 + 8 + 13 = 64
• Glass: 38 + 11 + 11 + 16 = 76
• Stalhrim: 39 + 11.5 + 11.5 + 16.5 = 78.5
• Dragonscale: 41 + 12 + 12 + 17 = 82

Links

• https://en.uesp.net/wiki/Skyrim:Armor#Armor_Cap