Thank you for using our tool! I’ve created a tool to calculate the probability of landing debuffs in “Honkai: Star Rail.”

Please use this as a reference when farming for relics or building your teams.

Debuff Hit Rate Calculator

How to Use This Tool

This guide will explain the details of each input field and how to interpret the results of the “Debuff Hit Rate Calculator.”

1. Input Field Details

Base Chance (%)

This is the fundamental probability of a skill or Light Cone applying a debuff.

You can find this value in the in-game descriptions for Traces and Light Cones.

Character Effect Hit Rate (%)

This is the total “Effect Hit Rate” value found on your character’s details screen.

It reflects the stats gained from Relic main stats, sub-stats, and Light Cones.

Effect RES Debuff (%)

This is the value of a debuff that reduces an enemy’s Effect RES, applied by an ally’s skill, a Blessing, etc.

Example: Dr. Ratio’s A4 Trace applies a -10% Effect RES debuff, so you would enter “-10”.

2. How to Read the Results

Once you’ve entered the values, two results will be displayed automatically.

Debuff Hit Rate

This shows the actual probability of your debuff hitting each type of enemy based on the stats you entered.

Required Effect Hit Rate

This is a handy reference table that shows how much more Effect Hit Rate you need to achieve a certain probability of landing your debuff.

This is useful for setting your build goals.

For example, if you want to find the required Effect Hit Rate to land a debuff on a Boss Enemy with a 90% probability, look for the value where the “90%” row and the “Boss” column intersect.

※ Disclaimer

This tool does not account for an enemy’s individual resistance to specific debuffs (e.g., Freeze RES, Imprisonment RES).

Therefore, the actual hit rate may be lower than the calculated result for some enemies.