FEH Combat Damage Predictor
Accurately predict combat outcomes in Fire Emblem Heroes by inputting unit stats, skills, and environmental factors. This damage calculator fire emblem heroes tool helps you optimize builds and strategize effectively.
Attacker's Stats & Skills
Enter the sum of the unit's visible Attack stat and their weapon's Might (e.g., 40 Atk + 15 Might = 55). Unitless value.
Enter total visible Attack buffs (e.g., +6 from Hone Atk) or debuffs (e.g., -7 from Panic). Unitless value.
Flat attack bonuses during combat (e.g., Death Blow 4 gives +8, Atk/Spd Solo 4 gives +7). Unitless value.
Attacker's Speed stat, used for follow-up attack considerations. Unitless value.
Current special cooldown count. 0 means special is ready. Unitless value.
Select the special skill the attacker has equipped. Note: healing effects are not factored into damage output.
Checks if the attacker has a weapon effective against the defender's movement type or weapon type (1.5x Atk multiplier).
Determines whether the defender's Defense or Resistance stat is used.
Defender's Stats & Modifiers
Defender's base Defense (if physical attack) or Resistance (if magical attack). Unitless value.
Visible Defense/Resistance buffs (e.g., +6 from Fortify Def) or debuffs (e.g., -7 from Chill Def). Unitless value.
Percentage of damage reduced by skills like Close Call, Spurn, etc. (e.g., 40 for 40% reduction). Percentage value.
Defender's current Health Points. Unitless value.
Checks if the defender is on a Defense Tile, granting +30% to their effective Def/Res.
Defender's Speed stat, used for follow-up attack considerations. Unitless value.
Combat Modifiers
Affects damage by a 20% multiplier (advantage/disadvantage).
Total hits the attacker will make (e.g., 1 for single attack, 2 for follow-up, 4 for Brave weapon + follow-up). Unitless value.
Total hits the defender will make in return (e.g., 0 for no counter, 1 for single, 2 for Quick Riposte). For simplicity, each counterattack is assumed to deal 20 damage.
Damage dealt before combat begins (e.g., from Poison Strike or Savage Blow). Unitless value.
Calculation Results
Total Damage Dealt: 0
Defender's HP Remaining: 0
Combat Outcome:
All damage values are unitless integers, as per Fire Emblem Heroes game mechanics.
| Step | Description | Value | Units |
|---|---|---|---|
| 1 | Attacker's Effective Attack (Pre-Special) | 0 | Unitless |
| 2 | Defender's Effective Def/Res | 0 | Unitless |
| 3 | Damage Per Hit (Pre-Damage Reduction) | 0 | Unitless |
| 4 | Damage Per Hit (Post-Damage Reduction) | 0 | Unitless |
Comparison of Attacker's Total Damage with and without their Special Skill.
What is a Fire Emblem Heroes Damage Calculator?
A Fire Emblem Heroes damage calculator is an essential online tool designed to help players predict the exact amount of damage dealt in combat between two units in the popular mobile game, Fire Emblem Heroes (FEH). By inputting various stats, skills, and environmental factors, players can accurately determine combat outcomes, optimize unit builds, and strategize for challenging modes like Arena, Aether Raids, and Abyssal maps.
This calculator is for anyone looking to gain a competitive edge or simply understand the intricate mechanics behind FEH combat. Whether you're a seasoned veteran planning a complex team composition or a new player trying to grasp the basics, this tool simplifies the often-complex FEH damage formula.
Common misunderstandings often arise from the game's many modifiers. Players might underestimate the impact of visible buffs versus in-combat buffs, or how damage reduction interacts with various special skills. This calculator aims to clarify these interactions, providing clear, unitless integer results that directly reflect in-game values.
Fire Emblem Heroes Damage Formula and Explanation
The core FEH damage formula is a multi-step process that combines raw stats with various multipliers and reductions. While seemingly complex, it can be broken down into manageable steps:
`Final Damage = ( ( ( Attacker_Atk + Weapon_Might + Visible_Atk_Buffs + In_Combat_Atk_Boosts ) * Effective_Multiplier * Weapon_Triangle_Multiplier ) + Special_Flat_Bonus - ( Defender_Def_Res + Visible_Def_Res_Buffs + Defense_Tile_Bonus ) * Luna_Multiplier ) * Damage_Reduction_Multiplier + Pre_Combat_Damage`
This formula is applied per hit, and then summed for total damage.
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Attacker_Atk | Attacker's base Attack stat. | Unitless | 30-60 |
| Weapon_Might | Attack value provided by the equipped weapon. | Unitless | 5-19 |
| Visible_Atk_Buffs | Attack bonuses/penalties displayed on the unit's stat screen (e.g., Hone Atk, Panic). | Unitless | -7 to +7 |
| In_Combat_Atk_Boosts | Attack bonuses that apply only during combat (e.g., Death Blow, Atk/Spd Solo). | Unitless | 0 to +10 |
| Effective_Multiplier | 1.5x multiplier if attacker has weapon effectiveness (e.g., Bow vs. Flier). | Unitless Ratio | 1 or 1.5 |
| Weapon_Triangle_Multiplier | 1.2x for advantage, 0.8x for disadvantage, 1.0x for neutral. | Unitless Ratio | 0.8, 1.0, 1.2 |
| Special_Flat_Bonus | Additional damage from specials like Bonfire (0.5x Def) or Ignis (0.8x Def). | Unitless | 0 to 50 |
| Defender_Def_Res | Defender's base Defense (physical) or Resistance (magical). | Unitless | 20-50 |
| Defense_Tile_Bonus | +30% effective Def/Res if defender is on a defense tile. | Unitless Ratio | 1 or 1.3 |
| Luna_Multiplier | 0.5x multiplier to foe's Def/Res if Luna or Aether special triggers. | Unitless Ratio | 1 or 0.5 |
| Damage_Reduction_Multiplier | (1 - DR%) from skills like Close Call, Spurn (ignored by Deadeye/Lethality). | Percentage | 0% to 80% |
| Pre_Combat_Damage | Damage dealt before the actual combat initiates (e.g., Poison Strike, Savage Blow). | Unitless | 0 to 10 |
Practical Examples with the Damage Calculator Fire Emblem Heroes
Let's illustrate how to use this damage calculator Fire Emblem Heroes with a couple of scenarios:
Example 1: Standard Melee Combat
- Attacker: Sword unit (Physical)
- Attacker Stats: Atk + Weapon Might = 60, No buffs/debuffs, No flat boosts, Speed 45, Special Cooldown 3 (has Glimmer).
- Defender: Axe unit
- Defender Stats: Def = 40, No buffs/debuffs, No DR, HP 60, Not on Defense Tile, Speed 30.
- Combat: Attacker has Weapon Triangle Advantage, 1 hit, No pre-combat damage.
- Expected Result: The calculator would show a significant amount of damage, likely enough to one-shot the defender, especially with Glimmer triggering. The weapon triangle advantage (1.2x) and Glimmer's 1.2x multiplier stack favorably.
Example 2: High Damage Reduction & Special Skill Interaction
- Attacker: Magical Tome unit (Magical)
- Attacker Stats: Atk + Weapon Might = 70, +6 Atk visible buff, +8 In-combat Atk boost, Speed 40, Special Cooldown 3 (has Deadeye/Lethality).
- Defender: High Res unit
- Defender Stats: Res = 50, +6 Res visible buff, 40% Damage Reduction, HP 70, On Defense Tile, Speed 45.
- Combat: Weapon Triangle Neutral, 2 hits by attacker, No pre-combat damage.
- Expected Result: Without Deadeye/Lethality, the defender's high Res, defense tile, and 40% DR would significantly reduce incoming damage. However, with Deadeye/Lethality, the calculation would ignore both the defender's effective Def/Res and their damage reduction, leading to a much higher, potentially lethal, damage output. This demonstrates the power of ignoring damage mitigation.
How to Use This Fire Emblem Heroes Damage Calculator
Using this FEH damage calculator is straightforward:
- Input Attacker's Stats & Skills: Fill in the attacker's combined Attack + Weapon Might, any visible buffs/debuffs, in-combat flat boosts, Speed, and their Special Skill. Check "Effective Damage" if applicable and select their "Weapon Type" (Physical or Magical).
- Input Defender's Stats & Modifiers: Enter the defender's relevant base Def/Res, any visible buffs/debuffs, Damage Reduction percentage (e.g., 40 for 40%), current HP, and Speed. Check "Defender on a Defense Tile" if they are.
- Adjust Combat Modifiers: Select the "Weapon Triangle Advantage" (Attacker Advantage, Neutral, Disadvantage), specify the "Attacker's Number of Hits" (1, 2, or 4 for Brave weapons + follow-ups), and "Defender's Number of Hits" (0, 1, or 2 for Quick Riposte). Add any "Pre-Combat Damage" if relevant.
- Calculate: Click the "Calculate Damage" button.
- Interpret Results: The "Calculation Results" section will display the "Total Damage Dealt" and the "Defender's HP Remaining." The "Combat Outcome" will indicate if the defender is defeated. Intermediate steps are shown in the table, and a chart visualizes damage with/without special.
- Copy Results: Use the "Copy Results" button to quickly grab the combat summary for sharing or record-keeping.
- Reset: The "Reset" button clears all inputs and restores default values.
Key Factors That Affect Fire Emblem Heroes Damage Calculation
Understanding the interplay of various factors is crucial for mastering the FEH damage formula:
- Base Stats & Weapon Might: These are the foundational numbers. Higher Attack and Weapon Might directly translate to higher damage, while higher Defense/Resistance reduces incoming damage.
- Visible Buffs/Debuffs (Rally, Chill, Panic): These modify a unit's displayed stats and are applied before most in-combat calculations. They can significantly swing combat outcomes. For a detailed guide, see our article on FEH Stat Buffs and Debuffs Explained.
- In-Combat Flat Attack Boosts (Death Blow, Solo skills): These bonuses are applied during the damage calculation and are not reflected in a unit's visible stats. They are powerful and stack with visible buffs.
- Weapon Triangle Advantage: A fundamental mechanic, granting a 20% damage bonus or penalty. Always aim for weapon triangle advantage when possible. Learn more about Weapon Triangle Mechanics in FEH.
- Special Skills: Game-changers that can drastically alter damage output. Specials like Ignis and Bonfire scale with Def/Res, while Luna and Aether bypass a portion of the foe's defenses. Our FEH Special Skills Tier List can help you choose the best options.
- Effective Damage: Weapons effective against certain unit types (e.g., Bows vs. Fliers) multiply the attacker's Atk by 1.5, making them incredibly potent in specific matchups.
- Damage Reduction Skills: Modern combat is heavily influenced by skills like Close Call, Spurn, and Guard Bearing, which reduce incoming damage by a percentage. Understanding how these work is vital, especially against high damage units. Refer to our Damage Reduction Skills Analysis.
- Defense Tiles: Environmental factors like Defense Tiles provide a 30% boost to a unit's effective Def/Res, making them much tankier.
- Follow-up Attacks: The number of hits in combat (single, double, brave weapon) directly multiplies the damage per hit. Speed comparisons and skills like Quick Riposte or Bold Fighter dictate follow-up attacks.
Fire Emblem Heroes Damage Calculator FAQ
Q: Does this damage calculator Fire Emblem Heroes account for all skills?
A: This calculator includes the most common and impactful damage-modifying skills and effects (visible buffs, in-combat boosts, specials, damage reduction, effective damage, weapon triangle, defense tiles). Some highly niche or complex interactions (e.g., specific unit-exclusive skills with unique damage formulas, deep HP threshold effects) might not be fully replicated for simplicity, but it covers the vast majority of combat scenarios accurately.
Q: Why are results unitless?
A: In Fire Emblem Heroes, all damage and stat values are represented as integers without specific units like "points" or "HP." The calculator reflects this game-specific convention to provide results that directly match in-game numbers.
Q: How does the calculator handle multiple hits (e.g., Brave weapons, follow-ups)?
A: The calculator allows you to input the "Attacker's Number of Hits" and "Defender's Number of Hits." It calculates the damage per hit and then multiplies it by the specified number of hits to give a total. Special skills are assumed to trigger on the first eligible hit.
Q: What if a special skill has a healing effect (e.g., Sol, Aether)?
A: For the purpose of calculating damage dealt to the opponent, healing effects are not factored into the total damage output. They only affect the HP of the unit using the special. Our calculator focuses solely on damage dealt to the defender.
Q: Can I use this calculator for Aether Raids or Arena?
A: Absolutely! This FEH damage calculation tool is perfect for planning strategies in competitive modes. By accurately predicting damage, you can optimize your team compositions, evaluate potential threats, and ensure your units can secure KOs or survive encounters.
Q: How does Damage Reduction (DR) interact with Deadeye/Lethality?
A: Skills like Deadeye and Lethality are explicitly designed to ignore damage reduction effects, as well as the foe's Defense/Resistance. Our calculator accurately models this interaction: if "Deadeye/Lethality" is selected, any "Damage Reduction %" input for the defender will be ignored.
Q: What is the difference between "Visible Atk Buffs" and "In-Combat Flat Atk Boosts"?
A: "Visible Atk Buffs" are those that appear on a unit's stat screen (e.g., from Rally skills, Hone skills). "In-Combat Flat Atk Boosts" are applied only during the combat calculation and do not change the unit's displayed stats (e.g., from Death Blow, Swift Sparrow, Solo skills). Both are crucial for total damage.
Q: What are the limits of this calculator?
A: While comprehensive, this calculator simplifies some highly nuanced interactions (e.g., specific HP threshold skills, complex debuffs from unique weapons, or multiple layers of damage reduction stacking beyond a simple percentage). It provides a strong approximation for the vast majority of combat scenarios in Fire Emblem Heroes.
Related Tools and Internal Resources
Enhance your Fire Emblem Heroes strategy with these other helpful tools and guides:
- FEH Stat Buffs and Debuffs Explained: A comprehensive guide to understanding how stat modifications work in Fire Emblem Heroes.
- FEH Special Skills Tier List: Discover the best special skills for various unit types and combat roles.
- FEH Weapon Triangle Mechanics: Deep dive into the fundamental combat advantage system of Fire Emblem Heroes.
- FEH Damage Reduction Skills Analysis: An in-depth look at skills like Close Call, Spurn, and how to counter them.
- FEH Unit Building Basics: Learn how to effectively build and equip your Fire Emblem Heroes units for optimal performance.
- FEH Arena and Aether Raids Strategy: Advanced strategies and tips for dominating competitive modes.