EHR Calculator Honkai Star Rail

Calculate the actual probability of applying debuffs in Honkai Star Rail based on Effect Hit Rate (EHR), enemy Effect RES, and base chance.

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About This Tool

This Honkai Star Rail EHR Calculator helps players determine the actual probability of applying debuffs to enemies. It uses the official game formula: Actual Probability = Base Chance × (1 + EHR) × (1 - Enemy Effect RES). Simply input your character's Effect Hit Rate (EHR), the enemy's Effect RES, and the debuff's base chance (default 100% for most skills) to get the accurate probability percentage. The tool is fully client-side, fast, and provides detailed explanations.

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How to Use

Enter your character's Effect Hit Rate (EHR) as a percentage (e.g., 67 for 67%).
Enter the enemy's Effect RES as a percentage (e.g., 40 for 40%).
Optionally adjust the debuff's base chance if different from 100%.
Click 'Calculate Probability' to see the result.
View the detailed probability percentage and interpretation below.

Frequently Asked Questions

Find Quick Answers

What is EHR in Honkai Star Rail?

EHR (Effect Hit Rate) is a stat that increases the chance of applying debuffs to enemies. It's expressed as a percentage and works with the game's probability formula.

How is the actual probability calculated?

The formula is: Actual Probability = Base Chance × (1 + EHR/100) × (1 - Enemy Effect RES/100). For example, with 50% EHR, 30% Enemy Effect RES, and 100% base chance: 100% × (1 + 0.5) × (1 - 0.3) = 105%.

What is the default base chance?

Most debuff skills in Honkai Star Rail have a 100% base chance, but some may vary. The tool defaults to 100%, but you can adjust it if needed.

Does this tool require an internet connection?

No, all calculations are performed client-side in your browser, so it works offline once loaded.

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