Fallout 4 Damage Resistance Calculator

Base Damage: Damage Resistance (%):

Damage Type	Perks/Modifiers	Sources/Equipment
Physical Damage	Heavy Gunner: +10% per rank	Combat Armor: Provides varying resistance
	Iron Fist: Increases unarmed damage	Power Armor: Significant physical damage resistance
	Armorer: Increases armor resistance
Energy Damage	Demolition Expert: Increases explosives resistance	Synth Armor: Can provide energy resistance
	Energy Weapons: Use Energy Weapon Perks
Radiation Damage	Radiation Resistance (various perks available)	RadAway: Reduces radiation damage over time
	Chem Resistant: 50% resistance to chem effects	Hazmat Suit: Provides high radiation resistance
Explosive Damage	Demolition Expert: Reduces explosive damage	Explosive Resistance Armor: Various armor sets
	Heavy Gunner: +10% per rank (for heavy weapons)
Fire Damage	Fireproof: 50% resistance to fire damage	Fire-Resistant Armor: Various armors can provide fire resistance
	Chem Resistant: Reduces damage from fire-related chems
Cryo Damage	Chilled: Reduces damage from freezing effects	Cold-Weather Gear: Can mitigate cryo effects
	Armor Mods: Some armor types have cryo resistance
Melee Damage	Iron Fist: Increases melee damage dealt	Power Armor: Can reduce melee damage taken
	Ghoulish: Healing effects when in radiation

Damage Resistance: Calculated as a percentage reduction of incoming damage.
Perks: Certain perks improve resistance to specific damage types or overall damage resistance.
Equipment: Various armors provide specific resistances and can be enhanced with mods.
Status Effects: Some perks and gear provide bonuses against specific types of damage (e.g., radiation, fire).

Stacking Effects: Damage resistance effects can stack, meaning wearing armor and having the right perks can significantly reduce damage taken.
Armor Mods: Always check the mod options available for your armor; they can provide additional resistances.
Chem Usage: Utilizing chems like Rad-X and Stimpaks can improve survivability in tough situations.