FEH Arena Calculator

Maximize your weekly rewards in Fire Emblem Heroes by optimizing your team’s score. This FEH Arena Calculator helps you determine your potential score range based on your units’ stats, merges, skills, and bonuses. Fine-tune your team composition to reach higher tiers and earn more Orbs, Heroic Grails, and Divine Codes.

Team Bonuses

Unit	Merge Score	BST Score	SP Score	Base Unit Score

Table 1: Detailed score breakdown for each unit before team bonuses are applied.

What is a FEH Arena Calculator?

A FEH Arena Calculator is a specialized tool designed for players of the mobile game Fire Emblem Heroes. Its primary purpose is to calculate the potential score a player’s team can achieve in the Arena game mode. The Arena is a core competitive mode where players battle against teams created by others to earn weekly rewards, such as Orbs, Heroic Grails, and Feathers. A higher score leads to a higher tier ranking and better rewards.

This calculator is essential for any player looking to be competitive or simply maximize their resource income. By inputting key data about each of the four heroes on your team—such as their Base Stat Total (BST), number of merges, and the total SP cost of their equipped skills—the FEH Arena Calculator can predict your scoring potential. This allows you to make informed decisions about which units to invest in, which skills to inherit, and how to build your team for optimal performance.

Who Should Use a FEH Arena Calculator?

Both new and veteran players can benefit from using a FEH Arena Calculator. Competitive players aiming for the highest tiers (Tier 20 and 21) use it to min-max every possible point. Mid-tier players can use it to secure a stable position and consistent rewards. Even free-to-play (F2P) players can use the calculator to understand how to best utilize their limited resources to build a score-efficient team.

FEH Arena Calculator Formula and Mathematical Explanation

The scoring system in Fire Emblem Heroes’ Arena can seem opaque, but it follows a consistent mathematical formula. Our FEH Arena Calculator uses this formula to provide an accurate estimate. The final score for a single match is determined by the average score of your four units, plus team-wide bonuses.

The core steps are:

1. Calculate Individual Unit Score: Each hero on your team has a score based on their stats and investment.
2. Apply Bonus Unit Multiplier: One unit on the team is designated as a “Bonus Unit” for the week. This unit’s individual score is doubled.
3. Add Team-wide Bonuses: Points are added for using Legendary Heroes in the correct season with blessed allies.
4. Calculate Average and Final Score: The scores of the four units are summed and then divided by four. The result is rounded down to the nearest whole number. This is your base match score.
5. Determine Score Range: Your final score for a match can increase by 12 points if your bonus unit gets at least one kill. This creates a score range.

The formula for a single unit’s score is:

Unit Score = 150 + (Merges × 2) + floor(BST / 5) + floor(Total SP / 100)

This FEH Arena Calculator automates this entire process for you.

Variables Table

Variable	Meaning	Unit	Typical Range
BST	Base Stat Total (unequipped stats)	Points	150 – 210
Merges	Number of times a unit has been merged	Count	0 – 10
Total SP	Sum of SP cost of all equipped skills	Points	800 – 2500
Bonus Unit	Weekly designated hero whose score is doubled	Boolean	Yes / No
Legendary Bonus	Bonus points from in-season Legendary Heroes	Points	0 – 96+

Practical Examples

Example 1: Budget Free-to-Play Team

A player is using a team of easily accessible units. Their bonus unit is a recent free hero.

• Unit 1 (Bonus): BST 185, 2 Merges, 1800 SP
• Unit 2: BST 175, 10 Merges, 1600 SP
• Unit 3: BST 170, 10 Merges, 1400 SP
• Unit 4: BST 170, 5 Merges, 1400 SP
• Team Bonuses: No legendary heroes.

Using the FEH Arena Calculator, the tool would first calculate individual scores, double the score for Unit 1, and then find the team average. The resulting score range might be around 738 – 750. This score is solid for maintaining a position in Tier 18 or 19.

Example 2: High-Investment “Whale” Team

A competitive player is aiming for Tier 21. Their team consists of modern, high-scoring units.

• Unit 1 (Bonus): BST 200, 10 Merges, 2400 SP
• Unit 2 (Legendary): BST 195, 10 Merges, 2400 SP
• Unit 3 (Blessed): BST 195, 10 Merges, 2400 SP
• Unit 4 (Blessed): BST 195, 10 Merges, 2400 SP
• Team Bonuses: 1 Legendary Hero in season, 2 allies with matching blessings.

The FEH Arena Calculator would show a significantly higher score. The combination of max merges, high BST, premium skills (high SP), and the legendary/blessing bonus results in a massive score increase. The potential score range could be 764 – 776, which is highly competitive for reaching and staying in Tier 21.

How to Use This FEH Arena Calculator

Using our FEH Arena Calculator is straightforward. Follow these steps to get an accurate score prediction:

1. Enter Unit Data: For each of the four units on your team, fill in the required fields. You will need to find this information within the game.
2. BST (Base Stat Total): View your hero’s stats in-game without any weapon equipped. Sum their HP, Atk, Spd, Def, and Res. Do not include stats from skills like Fury or Life and Death.
3. Merges: Enter the number of merges your unit has (from 0 to 10).
4. Total SP Cost: Go to the “Equip Skills” screen. Sum the SP cost of the equipped Weapon, Assist, Special, A, B, and C skills. High-cost skills like Aether (500 SP) or Tier 4 skills (300 SP) significantly boost your score.
5. Set Team Bonuses: Use the dropdowns to select which of your four units is the bonus unit. Then, specify the number of in-season legendary heroes and blessed allies on your team.
6. Review Your Results: The calculator will automatically update as you enter data. The primary result shows your score range (without and with a bonus kill). You can also see a detailed breakdown of each unit’s contribution in the table and chart below. This helps identify which hero is your weakest link, score-wise.

For more advanced strategies, you might find our Aether Raids Lift Calculator useful for the other main competitive mode.

Key Factors That Affect FEH Arena Results

Several factors influence your final score. Understanding them is key to using the FEH Arena Calculator effectively and improving your team.

1. Merges

Each merge adds a flat +2 points to a unit’s individual score. A +10 unit scores 20 points more than a +0 unit, which is a massive difference when averaged across the team.

2. Base Stat Total (BST)

Every 5 points of BST adds 1 point to a unit’s score. Newer units, especially armored and infantry ones, tend to have higher BST, making them score better naturally.

3. Skill SP Cost

Every 100 SP from equipped skills adds 1 point. Equipping high-cost skills like Galeforce, Aether, Rally+, and Tier 4 skills is crucial for maximizing score.

4. Bonus Unit

Having a bonus unit is non-negotiable for a high score, as it doubles that unit’s score. Furthermore, getting a kill with that unit adds a flat +12 points to your match score. A powerful bonus unit can make or break your week. Our Summon Simulator can help you plan for pulling future bonus units.

5. Legendary Heroes and Blessings

During their matching season, Legendary Heroes provide a significant score boost for each blessed ally on the team. This is one of the most potent ways to increase your team’s ceiling and is essential for top-tier play.

6. Duel Skills

Certain A-skills (like “R Duel Infantry 4”) artificially inflate a unit’s BST for scoring purposes to a specific value (e.g., 180). This allows older, low-BST units to remain score-relevant. Using a FEH Arena Calculator helps see their exact impact.

Planning your skill inheritance is crucial. Check out our Skill Inheritance Guide for tips.

Frequently Asked Questions (FAQ)

What is BST and how do I find it?

BST stands for Base Stat Total. It’s the sum of a unit’s five stats (HP, Atk, Spd, Def, Res) at level 40, without any skills or weapons equipped. You can see it in-game by unequipping their weapon and viewing their status screen.

Why is my score shown as a range?

The score range represents the two possible outcomes for a match. The lower number is your score if you don’t get any kills with your bonus unit. The higher number (+12 points) is your score if you get at least one kill with your bonus unit. Always aim for the higher score.

Do weapon refines or flowers affect my score?

No. Neither weapon refines nor Dragonflower stat boosts increase a unit’s BST for scoring purposes. Only merges, base stats, and Duel skills affect the BST calculation in the FEH Arena Calculator.

What are Duel skills?

Duel skills are A-slot skills that set a unit’s BST to a minimum value for scoring calculations. For example, R Duel Infantry 4 makes a red infantry unit score as if they had 180 BST. They are essential for making old favorite units viable in modern Arena.

How important is the bonus unit?

Extremely important. A bonus unit doubles their personal score, which is a massive boost. Failing to use a bonus unit will make it nearly impossible to maintain a high Arena tier. Our FEH Arena Calculator clearly shows this impact.

How do I calculate the total SP cost?

In the game, go to the “Learn Skills” or “Equip Skills” menu for a unit. The SP cost of each skill is listed there. Sum the costs for the weapon, assist, special, A, B, and C skills (and Sacred Seal if it’s a unique skill) to get the total. For help managing resources, see our Orb Management Guide.

Is this FEH Arena Calculator up to date?

Yes, this calculator uses the current scoring formula recognized by the Fire Emblem Heroes community. We monitor for any changes to the scoring mechanics and update the tool accordingly to ensure its accuracy.

Can I reach Tier 21 with my score?

The score required for Tier 21 fluctuates weekly depending on the bonus units and season. Generally, you need a score in the 760+ range. Use this FEH Arena Calculator to see if your team is close and identify areas for improvement, like higher-SP skills or more merges.