About ER QuickCalc

ER QuickCalc is a free Energy Recharge calculator for Genshin Impact. It helps you find the exact Energy Recharge your team needs — no guessing, no spreadsheets.

Built on deterministic simulation, not approximations. Every particle, every energy funneled, every swap cancel is modeled. The result is a precise ER target for each character in your team.

How it works

Pick your team. Configure rotations. The engine simulates energy flow and outputs the minimum ER needed for 100% burst uptime. Weapon passives, constellations, and particle funneling are all accounted for.

Privacy

ER QuickCalc is entirely client-side. Nothing is sent to a server. Your team configurations live in your URL — share it or don't. No accounts. No tracking. No data collection.

Open source

The calculator engine and character data are open source. Contributions, bug reports, and feedback are welcome onReddit.

Support the project

ER QuickCalc is free and will stay free. If the tool helps you, consider supporting its development. Your donations help cover server costs and fund new features.

Support on Ko-fi