Star Rail Relic Calculator
The definitive tool to calculate Crit Value and Relic Efficiency for HSR builds.
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Formula: CV = (Crit Rate × 2) + Crit Damage. Score is calculated by weighing Crit, ATK%, and SPD against maximum possible rolls.
Substat Distribution Chart
Figure 1: Comparison of input values scaled for visualization within the star rail relic calculator.
What is star rail relic calculator?
A star rail relic calculator is a specialized utility designed for players of Honkai: Star Rail to quantify the quality of their gear. In the endgame of HSR, relics represent the most significant source of character power. Since substat rolls are randomized, players use the star rail relic calculator to determine which pieces are worth leveling up and which should be salvaged for relic remains.
Who should use this? Anyone from casual players trying to clear Memory of Chaos to hardcore theorycrafters looking for the “perfect” build. A common misconception is that a relic must have four “perfect” stats to be useful. In reality, a star rail relic calculator helps you see that high rolls in two key stats often outweigh mediocre rolls in four.
star rail relic calculator Formula and Mathematical Explanation
The core of any star rail relic calculator is the Crit Value (CV) formula. Because Crit Rate is twice as rare and provides a 1:2 ratio efficiency compared to Crit Damage, it is weighted double.
The CV Formula: CV = (Crit Rate × 2) + Crit Damage
To calculate the “Efficiency Score,” the star rail relic calculator compares your actual rolls to the maximum theoretical values for a Level 15 relic.
| Variable | Meaning | Unit | Typical Range (Per Roll) |
|---|---|---|---|
| Crit Rate | Probability of a critical hit | % | 2.5% – 3.8% |
| Crit Damage | Multiplier for critical hits | % | 5.1% – 6.4% |
| ATK% | Percentage-based Attack increase | % | 3.4% – 4.3% |
| Speed (SPD) | Frequency of turns in battle | Flat | 2 – 2.6 |
Practical Examples (Real-World Use Cases)
Example 1: Seele’s Quantum Boot
Suppose you find a boot with 3.2% Crit Rate and 12.4% Crit Damage. Using the star rail relic calculator, the CV is (3.2 * 2) + 12.4 = 18.8. This is considered a “Good” piece for an early-to-mid-game build, allowing Seele to reach her crit requirements easily.
Example 2: Jing Liu’s Ice Orb
You have an Orb with 6.5% ATK, 2 SPD, and 18% Crit Damage. While the Crit Rate is zero, the star rail relic calculator shows a high efficiency because Jing Liu gains massive Crit Rate from her Talent, making the high Crit Damage and Speed extremely valuable for her specific kit.
How to Use This star rail relic calculator
Follow these steps to optimize your gear using the star rail relic calculator:
- Open your character screen in Honkai: Star Rail and select the Relic tab.
- Input the values for Crit Rate, Crit Damage, ATK%, and Speed into the respective fields of the star rail relic calculator.
- The star rail relic calculator will instantly update the Crit Value (CV) and Efficiency Score.
- Check the “Relic Tier” result. Tier S and SS are keepers, while Tier C or D might be temporary placeholders.
- Use the “Copy Results” button to share your build with friends or save it in a spreadsheet for character optimization.
Key Factors That Affect star rail relic calculator Results
- Main Stat Alignment: A relic with godly substats is useless if the main stat (e.g., HP on a DPS piece) doesn’t match the character’s needs. The star rail relic calculator focuses on substat quality, but main stats are the priority.
- Roll Brackets: Each time a relic upgrades, it picks a value from a range (Low, Mid, High). The star rail relic calculator accounts for these ranges to determine roll efficiency.
- Character Scaling: Some characters, like Blade, scale off HP. For them, the star rail relic calculator should ideally prioritize HP% over ATK%.
- Speed Breakpoints: Speed isn’t just a number; hitting 134 or 161 is crucial. This star rail relic calculator helps you see how much SPD each piece contributes.
- Diminishing Returns: Stack too much of one stat (like ATK) and its value drops. Balancing stats is where the star rail relic calculator excels.
- Set Bonuses: Sometimes a piece with lower CV is better if it completes a 4-piece set bonus like “Genius of Brilliant Stars.”
Frequently Asked Questions (FAQ)
What is a good Crit Value in the star rail relic calculator?
Generally, a CV of 20+ is “Good,” 30+ is “Great,” and 40+ is “Godly” for a single relic piece.
Does the star rail relic calculator work for supports?
Yes, but for supports, you should focus more on the Speed and Effect RES values rather than just CV.
Why is Crit Rate multiplied by 2?
In the game’s math, 1% of Crit Rate is roughly equivalent in “budget” to 2% of Crit Damage, so the star rail relic calculator doubles it to normalize the value.
Can I use the star rail relic calculator for level 0 relics?
Yes, it will show the starting efficiency, but the final score depends on where the rolls land at levels 3, 6, 9, 12, and 15.
What is the maximum Speed roll?
A maximum single Speed roll is approximately 2.6. A star rail relic calculator uses this to determine if you got a “high” or “low” roll.
Does the star rail relic calculator include flat ATK?
This specific version focuses on ATK% as it scales better, but flat ATK can be manually added to your total character attack calculations.
How many rolls can a relic have?
A 5-star relic starts with 3 or 4 substats and gains 5 additional rolls by level 15, for a total of 8 or 9 rolls depending on the starting count.
Why does my score seem low?
If you have many rolls in defensive stats like DEF or HP on a DPS piece, the star rail relic calculator will lower the DPS efficiency score.
Related Tools and Internal Resources
Explore our other tools to master your Honkai: Star Rail journey:
- HSR Build Optimizer – Deep dive into your total damage output per turn.
- Relic Farming Tips – Learn which caverns are most efficient for your resin.
- Honkai Star Rail Builds – Top builds for every character in the current meta.
- Substat Roll Calculator – Predict the outcome of your next relic upgrade.
- Relic Scorer – Compare your relics against the global player database.
- Relic Weight Guide – Understand the importance of Speed breakpoints for MoC.