Forge Of Empires Arc Calculator

Typical Arc Bonus Tiers Table
Arc Level	Bonus %	Investment Multiplier	Standard Rank
Level 10	31%	1.31x	Early Growth
Level 30	60%	1.60x	Intermediate
Level 60	80%	1.80x	High Level
Level 80	90%	1.90x	Thread Standard

What is the Forge of Empires Arc Calculator?

The Forge of Empires Arc Calculator is a specialized utility designed for players of the popular strategy game “Forge of Empires” (FoE). Its primary purpose is to determine how many Forge Points (FP) an investor receives when contributing to another player’s Great Building (GB). Because The Arc provides a massive percentage bonus to rewards, the Forge of Empires Arc Calculator becomes indispensable for members of “1.9 threads” or “leveling groups.”

Who should use it? Any player who owns or plans to own an Arc, or those participating in guild reward structures. A common misconception is that the Forge of Empires Arc Calculator only matters for high-level players. In reality, even a low-level Arc bonus can turn a loss-making investment into a profitable one, helping you snowball your FP growth. Using a Forge of Empires Arc Calculator ensures you don’t over-invest and lose points, or under-invest and lose a secured position.

Forge of Empires Arc Calculator Formula and Mathematical Explanation

The math behind the Forge of Empires Arc Calculator involves two main components: calculating the boosted reward and determining the “lock” amount. The boosted reward is what you receive back in your inventory (plus blueprints and medals).

The primary formula used by the Forge of Empires Arc Calculator is:

Total Reward = Base Reward + floor(Base Reward × (Arc Bonus % / 100))

The “Lock” formula determines when a position cannot be overtaken by another player:

Lock Points = (Total FP required for level - Total FP currently on GB) / 2

Variables Used in the Forge of Empires Arc Calculator
Variable	Meaning	Unit	Typical Range
Total FP	Full cost to level up	Forge Points	100 – 15,000+
Base Reward	Standard payout for rank	Forge Points	5 – 2,500
Arc Bonus	Percentage boost from Arc	Percentage (%)	0% – 100%+
Owner Progress	FP already paid by owner	Forge Points	0 – Total FP

Practical Examples (Real-World Use Cases)

Example 1: The Standard 1.9 Thread

A player wants to secure Position 1 (P1) on a Level 40 Cathedral of Aachen. The Base Reward is 200 FP. Using the Forge of Empires Arc Calculator with a 90% Arc bonus:

Inputs: Base Reward = 200, Bonus = 90%.

Output: 200 * 1.9 = 380 FP.

Result: The player should donate exactly 380 FP to the GB.

Example 2: Locking a Position

A GB requires 1000 FP total. The owner has put in 400 FP. No one else has contributed. Using the Forge of Empires Arc Calculator “Lock” function:

Calculation: (1000 – 400) / 2 = 300 FP.

Interpretation: If you put in 300 FP, you are guaranteed P1 because the remaining 300 FP isn’t enough for anyone to overtake you.

How to Use This Forge of Empires Arc Calculator

Using our Forge of Empires Arc Calculator is straightforward and designed for rapid decision-making during fast-paced guild threads:

Enter Total FP: Look at the Great Building and find the total points needed for the current level.
Enter Owner Contribution: Add up the Forge Points the owner has already contributed.
Input Base Reward: Check the “Rank” tab of the GB to see the standard reward for the position you want.
Set Your Arc Bonus: Most players use “90” for a level 80 Arc, but you can enter your specific percentage.
Analyze Results: The Forge of Empires Arc Calculator will instantly show the 1.9 reward and the safe lock amount.

Key Factors That Affect Forge of Empires Arc Calculator Results

Arc Level: Every level increase in your Arc changes the multiplier. A level 80 Arc is the “sweet spot” at 90%.
Guild Thread Rules: Some guilds use 1.8 or 1.85 threads. Ensure the Forge of Empires Arc Calculator percentage matches your guild’s specific rules.
Owner Self-Levelling: If the owner adds more FP, the lock amount decreases, which the Forge of Empires Arc Calculator handles in real-time.
Sniping Risks: If a position isn’t “locked,” external players might donate more than the 1.9 amount to take the spot.
Rounding Down: FoE always rounds down reward fractions. The Forge of Empires Arc Calculator uses the floor function to match in-game mechanics.
Competition: In active neighborhoods, the speed at which you use the Forge of Empires Arc Calculator can determine if you get a profitable spot or miss out.

Frequently Asked Questions (FAQ)

Why does the Forge of Empires Arc Calculator show a different number than the game?

This usually happens due to the Arc’s rounding rules. FoE rounds down every calculation. Ensure your bonus percentage is entered precisely.

What is a 1.9 thread?

It is a guild cooperation strategy where players with Level 80 Arcs (90% bonus) donate exactly the boosted reward amount (Base * 1.9) to help others level GBs for free.

Can I use the Forge of Empires Arc Calculator for profit?

Yes, if you have an Arc higher than Level 80 (e.g., Level 100), you can use the Forge of Empires Arc Calculator to find spots where the 1.9 payout is less than your personal bonus.

Is the lock amount the same for all positions?

No, the Forge of Empires Arc Calculator determines the lock based on remaining FP. P1 locks first, then P2, and so on.

Does the Forge of Empires Arc Calculator include blueprints?

Our current calculator focuses on FP, but the Arc bonus also applies to Blueprints and Medals at the same percentage rate.

What if the owner hasn’t put enough FP in?

The Forge of Empires Arc Calculator will show a lock amount that might be higher than the 1.9 reward. In this case, the position is not “safe” to take yet.

Why is Level 80 so important?

Level 80 provides a 90% bonus, making the math (1.9x) simple and standard across almost all top-tier FoE guilds.

Is it safe to use a Forge of Empires Arc Calculator?

Yes, these tools are third-party math aids and do not interact with the game code or violate Terms of Service.

Related Tools and Internal Resources

FoE Great Building Guide – Comprehensive data on every GB in the game.
FP Investment Strategies – Learn how to maximize your daily Forge Point income.
Arc Leveling Math – A deep dive into the cost of bringing your Arc to Level 80.
FoE Contribution Calculator – Track your total contributions across multiple buildings.
Guild Expedition Rewards – Compare GB rewards with other sources of FP and items.
Cultural Settlement Guide – Optimize your settlements for additional rewards.