Damage Reduction
| This page was last updated for (v1.0.5). |
- Main article: Combat
Damage Reduction is a stat that does exactly what it suggests: It reduces the amount of damage taken by a player or monster. Unlike other combat numbers that are complex calculations, a player's Damage Reduction is determined by simply adding together all Damage Reduction bonuses the player has, whether from equipment or something else like a 
Damage Reduction Potion or 
Leonardo.
Many monsters have Damage Reduction modifiers that affect their defensive stats.
Mechanics
Whenever a player or monster with Damage Reduction greater than 0% would receive damage, instead the damage they take is equal to:
[math]\displaystyle{ \text{Damage Taken} = \text{Base Damage} \times \left (1 - \text{Damage Reduction} \right ) }[/math]
Note that the Combat Triangle will affect how much damage reduction the player has if they are using a different style from the monster.
There is a hard cap of 95% on damage reduction. If a player or monster somehow reaches more than 95% total damage reduction, the excess will be ignored.
Damage Reduction Modifiers
| Source | Type | Damage Reduction | Other Modifiers |
|---|---|---|---|
 Damage Reduction Potion IV |
Item | +10% Damage Reduction | |
 Damage Reduction Potion III |
Item | +6% Damage Reduction | |
 Guardian Amulet |
Item (Amulet, Passive) | +5% Damage Reduction | +10% Attack Interval |
 Holy Aegis |
 Prayer |
+5% Damage Reduction | |
 Damage Reduction Potion II |
Item | +4% Damage Reduction | |
 Stone Skin |
Prayer | +3% Damage Reduction | |
 Damage Reduction Potion I |
Item | +2% Damage Reduction | |
 Lake Swim |
Agility Obstacle 6 | +1% Damage Reduction | +3% Chance To Preserve Prayer Points +5% Damage To All Monsters |
| Raft Building |
Agility Obstacle 8 | +1% Damage Reduction | +2% Damage To All Monsters +20 Maximum Hitpoints |
| Frozen Maze |
Agility Obstacle 11 |
+1% Damage Reduction | -20% Ammo Preservation -0.1s Monster Respawn Timer -20% Rune Preservation -3 Prayer Point Cost for Prayers (Prayer Point cost cannot go below 1) |
 Smithing Lesser Relic |
 Item (Consumable) |
+1% Damage Reduction | -5% Smithing Interval +10% Global Evasion |
 Yak |
Item (Summon1, Summon2) | +1% Damage Reduction | |
 Erran |
Pet | +1% Damage Reduction | |
| Leonardo |
Pet | +1% Damage Reduction | |
 Safeguard |
Prayer | +1% Damage Reduction | |
 Martyr |
Prayer |
-1% Damage Reduction | +40% Reflect Damage |
| Spike Trap |
Agility Obstacle 7 | -2% Damage Reduction | -40 Maximum Hitpoints |
 Knight's Summoning Defender |
Item (Shield, Passive) |
-3% Damage Reduction | -0.1s Attack Interval -10% Summoning Familiar Attack Interval |
| Mud Dive |
Agility Obstacle 4 | -4% Damage Reduction | +20 Maximum Hitpoints +5% Melee Accuracy Rating +2% Melee Maximum Hit |
 Masquerade Mask |
Item (Consumable) |
-4% Damage Reduction | -25% Thieving Stun Interval +45 Stealth while Thieving |
| Lava Jump |
Agility Obstacle 9 | -6% Damage Reduction | -6% Auto Eat Efficiency -6% Global Mastery XP -0.3s Monster Respawn Timer |
 Merman Pendant |
Item (Amulet, Passive) |
-10% Damage Reduction | -20% Attack Interval All player special attacks are disabled +75% Accuracy Rating +50% Maximum Hit |
Melee Damage Reduction Equipment
Ranged Damage Reduction Equipment
| Item Set | DR% Each | Helmet | Platebody | Platelegs | Boots | Gloves | Shield |
|---|---|---|---|---|---|---|---|
| (U) Green D-hide | 2% | - |  (U) Green D-hide Body
|
 (U) Green D-hide Chaps
|
- |  (U) Green D-hide Vambraces
|
 (U) Green D-hide Shield
|
| (U) Blue D-hide | 3% | - |  (U) Blue D-hide Body
|
 (U) Blue D-hide Chaps
|
- |  (U) Blue D-hide Vambraces
|
 (U) Blue D-hide Shield
|
| (U) Red D-hide | 4% | - |  (U) Red D-hide Body
|
 (U) Red D-hide Chaps
|
- |  (U) Red D-hide Vambraces
|
 (U) Red D-hide Shield
|
| (U) Black D-hide | 5% | - |  (U) Black D-hide Body
|
 (U) Black D-hide Chaps
|
- |  (U) Black D-hide Vambraces
|
 (U) Black D-hide Shield
|
| (U) Ancient D-hide | 6% | - |  (U) Ancient D-hide Body
|
 (U) Ancient D-hide Chaps
|
- |  (U) Ancient D-hide Vambraces
|
 (U) Ancient D-hide Shield
|
| Ice | 3% |  Ice Helmet
|
 Ice Platebody
|
 Ice Platelegs
|
 Ice Boots
|
- |  Ice Shield
|
| Slayer (Elite) | 4% |  Slayer Cowl (Elite)
|
 Slayer Leather Body (Elite)
|
- | - | - | - |
| Slayer (Master) | 6% |  Slayer Cowl (Master)
|
 Slayer Leather Body (Master)
|
- | - | - | - |
| Aeris God Armour | 8% |  Aeris God Helmet
|
 Aeris God Platebody
|
 Aeris God Platelegs
|
 Aeris God Boots
|
 Aeris God Gloves
|
- |
