Genshin ER Calculator

Optimize your character’s Energy Recharge (ER) for seamless elemental burst usage.

Genshin Impact ER Calculator

Enter your character’s details to calculate the required Energy Recharge (ER) for consistent elemental burst uptime. This calculator helps you understand ER needs based on your team’s energy generation and your character’s burst cost.

Your Character’s ER Requirements

How it’s calculated: We determine the total energy generated by your team, adjust for absorption and loss rates, and calculate how much energy your character receives from particles. The difference between your burst cost and the energy gained from particles is the ‘ER Deficit’. This deficit, combined with your base ER and any buffs, determines the target ER% needed to ensure burst uptime.

Energy Recharge Analysis Table

See how different particle generation scenarios impact your required Energy Recharge.

Team Particles (Per Cycle)	Effective Particles Absorbed	ER from Particles (%)	ER Deficit (Energy)	Required ER (%)

Table: Energy Recharge vs. Particle Generation Scenarios

What is Genshin ER Calculator?

The Genshin ER calculator is a specialized tool designed to help players determine the precise amount of Energy Recharge (ER) a character needs to consistently use their Elemental Burst. In the world of Genshin Impact, the Elemental Burst is often the most impactful ability a character possesses, providing significant damage, healing, or utility. However, bursts cost Energy, which is primarily replenished by collecting Energy Particles generated by characters. An insufficient ER stat means a character might not have their Burst ready when needed, disrupting team rotations and significantly reducing combat effectiveness. This calculator simplifies the complex calculations involved, making it easier for players to build characters and teams with optimal character builds.

Who Should Use It?

This tool is invaluable for:

• New Players: Those unfamiliar with the intricacies of ER mechanics and team energy management.
• Experienced Players: Seeking to fine-tune their builds for maximum efficiency, especially in challenging content like the Spiral Abyss.
• Team Builders: Players theorycrafting new team compositions and wanting to ensure energy consistency across all members.
• Artifact Optimizers: Anyone trying to decide whether to prioritize ER on an artifact sub-stat or use an ER% weapon/ Sands.

Common Misconceptions

• “More ER is always better”: While ER is crucial, excessively high ER can be a stat stick that doesn’t contribute to damage or survivability. There’s an optimal point for burst uptime.
• “All characters need 200% ER”: ER requirements vary drastically based on Burst Cost, team composition (energy generation), and artifact substats. This calculator helps illustrate this variance.
• “Artifact ER substats are enough”: Sometimes, even with good substats, the base ER and team generation aren’t enough, necessitating an ER weapon or Sands.

Genshin ER Calculator Formula and Mathematical Explanation

The core goal of the Genshin ER calculator is to find the minimum ER% stat required for a character to have their Elemental Burst ready at the start of their next turn (or rotation cycle), assuming optimal particle collection.

The calculation involves several steps:

1. Calculate Total Energy Generated: Sum the energy particles produced by all relevant team members during one rotation cycle.
2. Calculate Effective Particles Absorbed: Adjust the total generated particles by the character’s particle absorption rate and any team-wide particle loss.
3. Calculate ER Provided by Particles: Convert the absorbed energy particles into an equivalent ER% value.
4. Calculate ER Deficit: Determine the remaining energy needed to meet the Burst Cost after accounting for the ER provided by particles.
5. Determine Required ER%: Combine the ER Deficit, base ER, and any battery buffs to find the total ER% stat the character needs.

Step-by-Step Derivation:

1. Effective Particles Absorbed:
   
   Effective_Particles = Total_Particles_Generated * (Particle_Absorption_Rate / 100) * ((100 - Team_Particle_Loss) / 100)
2. ER Provided by Particles (in Energy):
   
   Energy_From_Particles = Effective_Particles * 1 (Each particle is worth 1 Energy)
3. ER Provided by Particles (as %):
   
   ER_%_From_Particles = (Energy_From_Particles / Burst_Cost) * 100
4. ER Deficit (Energy): This is the energy the character *cannot* generate through particles alone.
   
   ER_Deficit_Energy = Burst_Cost - Energy_From_Particles
   
   If Energy_From_Particles >= Burst_Cost, the deficit is 0.
5. Required ER% Stat: The character needs to cover the ER Deficit through their own ER stat. The ER stat contributes directly to filling the Burst Cost.
   
   Required_ER_% = (ER_Deficit_Energy / Burst_Cost) * 100
   
   This represents the *additional* ER needed beyond what particles provide.
   
   The *total* ER% stat needed is often thought of as:
   
   Total_Needed_ER_% = Base_ER_% + Battery_Buff_% + Required_ER_%
   
   However, the calculator focuses on the target ER% stat needed to *compensate* for the energy deficit, relative to the burst cost. A simpler and more direct representation is to calculate the total energy required and see how much ER% stat achieves that.
   
   The calculator simplifies this by directly calculating the ER% deficit that the character’s stats must cover:
   
   Target_ER_% = Base_ER_% + ER_%_From_Particles + Additional_ER_%_Needed
   
   Where Additional_ER_%_Needed is the ER% stat required to cover the deficit.
   
   A more practical approach used in the calculator is:
   
   Required_ER_% = Base_ER_% + ER_%_From_Particles + ER_%_Covering_Deficit
   
   The most intuitive way to present the primary result is the ER% stat needed on the character itself. Let’s refine:
   
   Total Energy Needed = Burst Cost
   
   Energy Provided by Particles = `Effective_Particles`
   
   Energy to be Provided by Character’s ER Stat = `Burst_Cost – Energy_Provided_by_Particles`
   
   This required energy must be met by the character’s ER% stat.
   
   So, `ER%_Stat_Needed = ( (Burst_Cost – Energy_Provided_by_Particles) / Burst_Cost ) * 100`
   
   This `ER%_Stat_Needed` is the target ER stat required on the character.
   
   Let’s adjust the formula for clarity:
   
   1. Calculate Energy Generated: `E_gen = Particle_Gen_Per_Cycle * (Particle_Conversion_Rate / 100)`
   
   2. Account for Loss: `E_absorbed = E_gen * ((100 – Team_Particle_Loss) / 100)`
   
   3. Energy Deficit (raw): `E_deficit_raw = Burst_Cost – E_absorbed`
   
   4. Required ER% Stat: The character needs ER% to cover this deficit. Each 1% ER stat provides 1 Energy when the Burst Cost is 100. Thus, the ER% needed is directly related to the deficit.
   
   Required_ER_% = (E_deficit_raw / Burst_Cost) * 100`
   
   This represents the ER% the character *must* contribute. The calculator displays this as the primary result.
   
   We also show the *actual* ER% provided by particles:
   
   ER_%_Provided_By_Particles = (E_absorbed / Burst_Cost) * 100`
   
   And the ER% deficit to cover:
   
   ER_Deficit_to_Cover_% = Required_ER_% - Battery_Buff_%` (if Battery Buff is considered as direct ER%)
   
   A simpler presentation:
   
   1. Effective Particles = `Particle_Gen_Per_Cycle * (Particle_Conversion_Rate / 100) * ((100 - Team_Particle_Loss) / 100)`
   
   2. Energy from Particles = `Effective_Particles`
   
   3. ER% from Particles = `(Energy_from_Particles / Burst_Cost) * 100`
   
   4. ER Deficit (Energy) = `Burst_Cost - Energy_from_Particles` (min 0)
   
   5. Required ER% Stat = `Base_ER_% + Battery_Buff_% + ER_%_Needed_to_Cover_Deficit`
   
   The calculator focuses on finding `ER_%_Needed_to_Cover_Deficit`.
   
   Let's redefine the primary output as the TARGET ER% STAT needed on the character, including base ER and buffs.
   
   Target_ER_Stat = (Burst_Cost - Energy_from_Particles) / 1 + Battery_Buff_%` This doesn't seem right.
   
   Let's stick to the most common interpretation: Calculate the energy deficit and express it as a percentage of the burst cost, then add base ER.

   Final Logic:
   
   1. `effectiveParticles = particleGenPerCycle * (particleConversionRate / 100) * ((100 - teamParticleLoss) / 100);`
   
   2. `energyFromParticles = effectiveParticles; // Each particle is 1 energy`
   
   3. `erProvidedByParticlesPercent = (energyFromParticles / burstCost) * 100;`
   
   4. `energyDeficit = burstCost - energyFromParticles;`
   
   5. `if (energyDeficit < 0) energyDeficit = 0;`
   6. `requiredErStatPercent = (energyDeficit / burstCost) * 100; // ER% needed to cover deficit`
   
   7. `finalRequiredEr = baseER + batteryEffectiveness + requiredErStatPercent; // THIS IS THE TARGET STAT`

   The calculator will display:
   
   - Primary Result: `finalRequiredEr` (The target ER% stat needed)
   
   - Intermediate 1: `effectiveParticles` (Effective Particles Absorbed)
   
   - Intermediate 2: `erProvidedByParticlesPercent` (ER% from Particles)
   
   - Intermediate 3: `requiredErStatPercent` (ER% deficit to cover *by stats*)

   Formula Explanation Text:
   
   "First, we calculate the effective number of energy particles your character absorbs from the team's generation, accounting for absorption rates and particle loss. This provides a certain amount of energy. We then determine the energy deficit: the difference between your burst's cost and the energy gained from particles. This deficit is converted into the required Energy Recharge percentage ('ER% deficit to cover'). Finally, we add your character's base ER and any ER buffs from teammates (like Favonius weapons) to this deficit percentage to determine the total ER% stat your character needs to reach for consistent burst uptime."

Variable Explanations

Variable	Meaning	Unit	Typical Range
Elemental Burst Cost	The amount of energy required to activate a character's Elemental Burst.	Energy	40 - 80
Energy Particles Generated Per Cycle	Total energy particles produced by all characters in the team during one rotation.	Particles/Cycle	10 - 30+
Particle Conversion Rate	The percentage of generated energy particles that are successfully absorbed by the active character. Influenced by character proximity and enemy mechanics.	%	70 - 95%
Team Particle Loss Rate	The percentage of generated particles that are lost due to factors like enemy movement, off-field generation, or overlapping particle spawns.	%	0 - 15%
Base Energy Recharge	The inherent Energy Recharge stat a character has based on their level and ascension.	%	100% (typically)
Battery ER Buff	Additional Energy Recharge provided by teammates, often through weapon passives like Favonius series or specific character skills.	%	0 - 30%+
Effective Particles Absorbed	The net number of particles successfully gathered by the character after all conversions and losses.	Particles	Calculated
ER from Particles (%)	The equivalent percentage of a Burst Cost that can be covered by the energy particles absorbed.	%	Calculated
ER Deficit (Energy)	The raw amount of energy missing from particles needed to meet the Burst Cost.	Energy	Calculated
Required ER% Stat	The total Energy Recharge percentage stat the character needs on their build (Base + Substats + Weapon + Set Bonuses) to cover the deficit.	%	Calculated

Practical Examples (Real-World Use Cases)

Example 1: Raiden Shogun - Hypercarry Build

Scenario: Raiden Shogun (Burst Cost: 90) in a team where she generates 15 particles per cycle (e.g., from herself using Favonius Lance and her own E skill). Assume 85% absorption rate and 5% team particle loss.

Inputs:

• Burst Cost: 90
• Particles Generated Per Cycle: 15
• Particle Conversion Rate: 85%
• Team Particle Loss: 5%
• Base ER: 100%
• Battery ER Buff: 20% (From Favonius Lance passive, assuming it generates particles contributing to her own ER needs indirectly)

Calculation Breakdown:

• Effective Particles Absorbed: 15 * 0.85 * (1 - 0.05) = 12.08 particles
• Energy from Particles: 12.08 Energy
• ER Provided by Particles (%): (12.08 / 90) * 100 = 13.42%
• ER Deficit (Energy): 90 - 12.08 = 77.92 Energy
• ER% Deficit to Cover: (77.92 / 90) * 100 = 86.58%
• Required ER Stat: 100% (Base) + 20% (Buff) + 86.58% (Deficit) = 206.58%

Interpretation: Raiden Shogun needs approximately 207% ER to ensure her 90-cost burst is always ready, even with her base ER and battery buffs. This high requirement is why ER is often prioritized on her Sands and Goblet/Circlet.

Example 2: Xiangling - National Team

Scenario: Xiangling (Burst Cost: 80) in a standard National Team (Bennett, Xingqiu, and the player character, often an Anemo unit). Assume Bennett and Xingqiu generate enough particles that Xiangling effectively absorbs 25 particles per cycle, with minimal particle loss (2%).

Inputs:

• Burst Cost: 80
• Particles Generated Per Cycle: 25 (effective contribution to Xiangling)
• Particle Conversion Rate: 90% (Xiangling is often on-field during generation)
• Team Particle Loss: 2%
• Base ER: 100%
• Battery ER Buff: 0% (Assuming no ER-boosting weapons/skills specifically for Xiangling's ER needs)

Calculation Breakdown:

• Effective Particles Absorbed: 25 * 0.90 * (1 - 0.02) = 22.05 particles
• Energy from Particles: 22.05 Energy
• ER Provided by Particles (%): (22.05 / 80) * 100 = 27.56%
• ER Deficit (Energy): 80 - 22.05 = 57.95 Energy
• ER% Deficit to Cover: (57.95 / 80) * 100 = 72.44%
• Required ER Stat: 100% (Base) + 0% (Buff) + 72.44% (Deficit) = 172.44%

Interpretation: Xiangling needs around 170-180% ER in this setup. While her base ER is 100%, the particles generated by Bennett and Xingqiu cover a significant portion, reducing the ER% needed from her artifacts and weapon.

How to Use This Genshin ER Calculator

Using the Genshin ER calculator is straightforward. Follow these steps to get accurate results:

1. Identify Your Character's Burst Cost: Find the energy cost of the Elemental Burst you want to calculate ER for. This is usually listed on the character's details screen (e.g., 60, 80).
2. Estimate Team Energy Generation: Determine how many energy particles your *entire team* generates during one combat rotation. Consider particles generated by character skills, especially from weapons like the Favonius series. Be realistic about your team's rotation length.
3. Assess Particle Absorption: Estimate the percentage of these generated particles your target character will actually absorb. If they are often off-field or far from the particle source, this rate will be lower.
4. Factor in Particle Loss: Consider any mechanics that cause particles to disappear before being collected (e.g., enemies moving away, particles spawning off-screen).
5. Input Base ER and Buffs: Your character's base ER is typically 100%. Add any flat ER% bonuses from teammates (e.g., Elegy for the End, certain artifacts, or weapon passives).
6. Enter Values into the Calculator: Input all the gathered information into the respective fields of the calculator.
7. Click "Calculate ER Needs": The calculator will instantly provide the primary result: the total ER% stat your character needs. It will also show intermediate values like effective particles absorbed and the ER% deficit.

How to Read Results

• Primary Result (Required ER%): This is the target ER% stat you should aim for on your character's build (artifacts, weapon, ascension stats).
• Effective Particles Absorbed: Shows how many particles your character is expected to collect.
• ER from Particles (%): Indicates how much of your Burst Cost is covered by these particles, expressed as a percentage.
• ER Deficit to Cover: The percentage of your Burst Cost that *must* be covered by your character's own ER stat and buffs.

Decision-Making Guidance

• High Required ER%: If the result is significantly higher than your character's base ER (e.g., >150% for a 60-cost burst), you'll likely need an ER% weapon or ER% Sands artifact.
• Moderate Required ER%: If the result is in the 130%-160% range for a 60-cost burst, focus on ER substats on your artifacts and potentially an ER weapon.
• Low Required ER%: If the result is close to or below your base ER, you can likely use a stat-boosting Sands (ATK%, Crit DMG%, etc.) and focus ER substats only if necessary.
• Using the Table and Chart: Experiment with the 'Team Particles Generated' input in the table section or observe the chart to see how improving team energy generation can lower your character's individual ER requirements. This might involve switching to Favonius weapons on other team members.
• Remember to also consider Genshin Impact team comps synergy when making build decisions.

Key Factors That Affect Genshin ER Results

Several factors significantly influence the Energy Recharge requirements for any given character:

1. Elemental Burst Cost: This is the most direct factor. Bursts that cost more energy (e.g., 80) naturally require more ER to sustain than those with lower costs (e.g., 40). A character with an 80-cost burst needs substantially more energy generation support than one with a 40-cost burst.
2. Team Energy Generation (Particle Spawns): The number of energy particles generated by the *entire team* is paramount. Characters with skills or weapons that produce many particles (like many Geo characters with their constructs, or characters wielding Favonius weapons) drastically reduce the ER needs of others. A strong "battery" character is key for high-cost bursts.
3. Particle Conversion & Absorption Rate: Not all generated particles are absorbed. If the target character is off-field, too far away, or particles are generated when they are not the active character, many can be missed. Higher absorption means lower individual ER needs. Character-specific mechanics can affect this.
4. Elemental Resonance: While not directly impacting ER calculation formulas, certain Elemental Resonances (like Geo's) can provide shields that reduce interruption, indirectly helping maintain rotations and particle generation.
5. Enemy Mechanics & Type: Some enemies generate their own particles, while others might have mechanics that cause particles to dissipate quickly or be hard to collect. Bosses might also have phases where particle generation is temporarily halted.
6. Rotation Length and Structure: The defined "cycle" length is critical. If a team's rotation is longer, characters have more time to generate energy, but the burst cost also remains the same. A longer rotation might necessitate higher ER if particle generation doesn't scale proportionally. Efficient rotations are key for Genshin Impact combat.
7. Artifact Substats and Weapon Choice: The player's actual build plays a massive role. Prioritizing ER% on artifact substats, using an ER% weapon (like Favonius weapons, Solar Pearl, etc.), or choosing an ER% Sands artifact directly impacts how much ER the character achieves. This calculator helps decide *which* of these choices is necessary.
8. Character Skills and Passives: Some characters have unique abilities that interact with energy. For example, Raiden Shogun's "Eye of Stormy Judgment" provides energy recharge to the active character when her Elemental Skill hits. Understanding these synergies is vital.

Frequently Asked Questions (FAQ)

Q1: What is the standard ER requirement for a 60-cost burst?

Generally, for a 60-cost burst, aiming for around 120-150% ER is a good starting point if your team provides decent particle generation. If particle generation is low, you might need upwards of 160-180%. Characters like Bennett or Fischl often act as batteries, significantly reducing ER needs for others.

Q2: What is the standard ER requirement for an 80-cost burst?

80-cost bursts are demanding. Without strong battery support, you might need 180-220%+ ER. With good particle generation (e.g., multiple Favonius weapons, strong elemental skill particle producers), this can sometimes be lowered to 150-170%. Raiden Shogun herself is a notable exception, often building close to 200-270% ER for maximum damage output.

Q3: How do Favonius weapons affect ER needs?

Favonius weapons (Favonius Sword, Bow, Codex, Lance, Greatsword) generate extra energy particles on a critical hit. These particles can be used by the wielder or other teammates. Equipping Favonius weapons on supports can drastically increase team particle generation, significantly lowering the ER requirements for the main damage dealer or burst-reliant characters. The calculator accounts for this via the 'Battery ER Buff' if you estimate the particle generation equivalent.

Q4: Do I need ER on characters who aren't my main DPS?

Yes, often. If a support character has an important Elemental Burst for the team's rotation (e.g., Bennett's healing/buff, Xingqiu's rain swords, Kazuha's crowd control/buff), they need enough ER to use it consistently. The calculator helps determine these needs for any character.

Q5: What if my character generates their own particles?

Characters like Raiden Shogun generate energy during their Burst, but this is typically for team-wide benefits or their own subsequent bursts. The calculator assumes particles generated *per cycle* are from sources other than the target character's burst ability itself, focusing on the energy needed *before* their burst can be used again. For characters like Raiden, you'd input the particles *she* generates through her skill or teammates' Favonius procs into 'Particles Generated Per Cycle', and her base ER/buffs into 'Base ER' and 'Battery ER Buff'.

Q6: How does the "Particle Conversion Rate" work?

This represents the likelihood that energy particles generated near your active character will be absorbed by them. Proximity is key. If particles spawn far away, or if you switch characters quickly after generation, the effective absorption rate decreases. A rate of 80-90% is common, but it can be lower if particles are difficult to collect.

Q7: Can I use this calculator for co-op mode?

The calculator is primarily designed for single-player team building where you control energy generation and absorption. In co-op, energy particle distribution can be chaotic and harder to predict, making precise ER calculations less reliable. However, understanding general ER needs still applies.

Q8: What if the calculator shows I need less ER than my base 100%?

This scenario implies that the energy particles generated by your team are sufficient to cover your Burst Cost entirely, possibly even with excess. In such cases, the "Required ER% Stat" will be low, indicating you can safely use an ATK% or Crit DMG% Sands and focus substats elsewhere. The calculator's logic ensures the deficit is calculated correctly (minimum 0).