I’ve created a tool to calculate the number of actions a character can take per round based on their Speed in the popular game “Honkai: Star Rail.”
Use this as a reference when farming for relics and building your teams.
Action Calculator
How to Use This Tool
Here’s a detailed explanation of each input field and how to interpret the results.
1. Input Field Details
For an accurate simulation, please configure each item according to your character’s in-battle stats.
Character’s SPD
Enter the character’s final Speed, including all in-battle buffs (e.g., Ruan Mei’s talent) and debuffs.
You can check this value on the character details screen in-game or on the status details screen during combat.


Initial Action Advance (%)
This applies any “Action Advance” effects that activate at the start of a battle.
Select the appropriate option or enter a custom value.
Ornament: “Sprightly Vonwacq”

Check this box if your character is equipped with a 2-piece set of the “Sprightly Vonwacq” ornament.
Light Cone: “Dance! Dance! Dance!”

To apply the Action Advance effect from “Dance! Dance! Dance!” after the wearer uses their Ultimate, set the following two options:
- Ultimate Uses: Enter the number of times you expect the wearer to use their Ultimate by the end of the calculated round.
- Superimposition: Select the Superimposition level of the “Dance! Dance! Dance!” Light Cone. A higher level results in a stronger effect.
Relic: “Eagle of Twilight Line”

Set this if you want to apply the 4-piece set effect of “Eagle of Twilight Line” (advances action by 25% after using Ultimate).
- Ultimate Uses: Enter the number of times you expect the wearer to use their Ultimate by the end of the calculated round.
2. Understanding the Results
Once you’ve entered all the data, you can check the table to see how many actions your character can take in each round.
Round
This unit represents the progression of time in content like the “Memory of Chaos” or “Pure Fiction.”
In “Memory of Chaos,” clearing the stage within a total of 10 rounds for both teams is required for the highest rating.

indicates the remaining rounds (in Memory of Chaos)
Total Actions
This shows the total number of actions the character can perform by the end of that round.
Remaining AV (Apocalyptic Shadow)
This is the remaining Action Value (from an initial value of 2000) at the moment the character completes their final action for the “Total Actions” count.
In the “Apocalyptic Shadow” content, the higher this remaining value is when you defeat the boss, the more points you will earn.
Next SPD Target
This indicates the minimum Speed required to take one additional action in each round. Reaching this Speed will grant you an extra turn within that round.
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