Damage Calculator

Enter your character stats + skill multiplier + enemy info → get non-crit / crit / average damage using the game's real formula.

Pick a character

ATK Enter your final ATK (base + light cone + relics). See in-game or use the UID tool.

Skill multiplier (%) The % of ATK the hit deals, e.g. an Ultimate at 200% → enter 200.

DMG Bonus (%) Total DMG bonus (element + skill + buffs).

CRIT Rate (%)

CRIT DMG (%)

✦✧

Fire Erudition

Damage per hit — Himeko

–

CRIT! –

Non-crit

–

Average

–

On crit

–

Enemy & defense

Enemy level

Enemy elemental RES (%)

RES PEN (%)

DEF reduction / ignore (%)

Vulnerability (%)

Enemy Weakness Broken

What is the Damage Calculator?

A tool that computes exactly how much a hit deals in Honkai: Star Rail. Enter your character stats (ATK, crit…), the skill multiplier and enemy info, and it applies the game's real formula to give three numbers: non-crit, crit, and average. Use it to compare builds, pick characters, or understand why your hits land soft or hard.

How to use — 3 steps

Step 1: Enter your character stats — ATK, CRIT Rate & DMG, DMG Bonus % (grab them fast with the UID Build tool).
Step 2: Enter the skill multiplier (%) of the hit you want — see the Skills section on the character page.
Step 3: Set the enemy level & RES, toggle 'Weakness Broken' if the enemy is broken. Results appear instantly.

The formula (transparent)

Damage = (Multiplier × ATK) × (1 + DMG%) × DEF multiplier × RES multiplier × (1 + Vulnerability) × Break multiplier. Where DEF multiplier = 100 / ((EnemyLvl + 20) × (1 − DEF reduction%) + 100); on crit multiply by (1 + CRIT DMG); average = 1 + CRIT Rate × CRIT DMG; an unbroken enemy takes 90%.

Glossary

Skill multiplier — the % of ATK a hit deals (Basic ~100%, Skill ~150-250%, Ultimate ~200-400%).
DEF multiplier — higher-level enemies have more DEF → less damage; DEF reduction/ignore raises your damage.
Elemental RES — an enemy resistant to your element takes less; RES PEN offsets it.
Weakness Break — a broken enemy takes 100%; an unbroken one takes only 90%.

Frequently asked questions

Where do I find the skill multiplier?

On the character page, the 'Skills' section lists each hit's damage %. Enter that % into the multiplier field.

Why three numbers?

Crits are random: 'non-crit' is when you don't crit, 'on crit' is when you do, and 'average' is the long-run expectation — use the average to compare builds.

What enemy level should I use?

Around level 85–95 (endgame bosses). The higher the level, the more DEF and the less damage.

Is this accurate?

Yes. We use HSR's real multiplicative formula (DEF, RES, break, crit) — the core formula every damage tool relies on.

Build Lookup by UID → Pity Calculator →