About

An independent, transparent damage calculator for Genshin Impact

Genshin Damage Calculator is a free, fan-made theorycrafting tool that computes exact damage numbers for every playable character using the official five-multiplier formula. It is built and maintained by Kai Ren, a long-time Genshin Impact player, and requires no signup or download.

Who is behind this tool?

The calculator is written and maintained by Kai Ren, who has played Genshin Impact since version 1.0 and theorycrafts team rotations as a hobby. Every preset in the roster — character stats, weapons, artifacts, and buff assumptions — is hand-checked against the live game within 48 hours of each version patch. You can read the full changelog on the homepage under “Data & updates” or reach out via the contact page.

How are damage numbers calculated?

The engine multiplies five independent factors from the official in-game formula: Total ATK × Skill Multiplier × (1 + DMG Bonus) × CRIT × Reaction, then applies enemy DEF and RES. Amplifying reactions use the official Vaporize (×1.5) and Melt (×2.0) coefficients with the standard Elemental Mastery scaling of 2.78 × EM ÷ (EM + 1400). Transformative reactions ignore ATK and CRIT and scale with character level and EM. The full breakdown is documented in the damage formula section on the homepage.

Where does the data come from?

Character base stats, weapon stats, and talent multipliers are transcribed from the live game and cross-checked against HoYoverse’s official announcements.

Independence & affiliation

This is an independent fan-made project. It is not affiliated with, endorsed by, or sponsored by HoYoverse, miHoYo, or Cognosphere. Genshin Impact and all related names, characters, and assets are property of their respective owners. The tool is free, shows no paywall, and never asks for account credentials. See our privacy policy and terms of use for details.