Arc Calculator Foe

Optimize your Forge of Empires Great Building investments with precision

Standard 1.9 Thread Reference Table

Base Reward (FP)	1.9 Rate Contribution	Profit (at 90% Arc)	Profit (at 100% Arc)

This table shows how different base rewards scale with common Arc levels.

What is Arc Calculator FoE?

The arc calculator foe is an essential tool for any serious Forge of Empires player. In the game, The Arc is a Great Building that provides a massive boost to the rewards you receive when contributing forge points to other players’ buildings. This calculator allows you to input the base reward of a position and see exactly how many forge points you will receive back, including the percentage bonus from your own Arc.

Using an arc calculator foe ensures that you are maximizing your FP (Forge Point) growth. Most high-level guilds use “1.9 threads” where players contribute exactly 1.9 times the base reward to each other’s buildings. This is because a level 80 Arc provides exactly a 90% bonus (base x 1.9). Without a precise arc calculator foe, you might over-invest or lose out on potential profits from “sniping” buildings in your neighborhood.

Arc Calculator FoE Formula and Mathematical Explanation

The mathematics behind the arc calculator foe is relatively straightforward but requires precise rounding because Forge of Empires always rounds down to the nearest whole number for rewards.

The core formula is:

Total Reward = floor(Base Reward × (1 + (Arc Bonus % / 100)))

Variable	Meaning	Unit	Typical Range
Base Reward	Standard reward for P1-P5	Forge Points (FP)	5 – 5,000
Arc Bonus %	Your Arc’s contribution boost	Percentage (%)	0% – 100%+
Total Required	Points to finish GB level	Forge Points (FP)	100 – 15,000

Practical Examples (Real-World Use Cases)

Example 1: The Standard 1.9 Contribution
If you are in a 1.9 thread and you want to take P1 on a building where the base reward is 500 FP. Using the arc calculator foe, you multiply 500 by 1.9 (assuming a level 80 Arc).
Calculation: 500 × 1.9 = 950. You contribute 950 FP and receive exactly 950 FP back when the building levels, resulting in a break-even for you but a massive benefit for the owner.

Example 2: Sniping for Profit
You see a neighbor with a Great Building where P2 has a base reward of 200 FP. Your Arc is Level 100 (92% bonus).
Using the arc calculator foe: 200 × 1.92 = 384 FP.
If you can secure P2 by paying only 300 FP, you make a profit of 84 FP. This is why the arc calculator foe is vital for competitive play.

How to Use This Arc Calculator FoE

1. Enter the Base Reward: Look at the Great Building and find the forge point reward listed for the position you want.
2. Input your Arc Bonus: Check your own Arc’s bonus percentage in your city.
3. Add Total Level Cost: If you want to calculate how much is needed to “secure” a spot (so nobody can outbid you), enter the total FP required for the current level.
4. Review Results: The arc calculator foe will instantly show you the total reward, the 1.9 rate, and the “Secure Amount.”
5. Copy and Paste: Use the copy button to share calculations with guildmates in message threads.

Key Factors That Affect Arc Calculator FoE Results

• Arc Level: The most significant factor. Reaching level 80 is the “sweet spot” for most players as it unlocks the 1.9 multiplier used by the community.
• Rounding Rules: FoE always rounds down. If your calculation results in 190.9, you only get 190. The arc calculator foe handles this automatically.
• Contribution Thread Rules: Different guilds use different rates (1.8, 1.85, 1.9, or even 1.92). Ensure your bonus matches the thread rules.
• Sniping Competition: Neighbors may be using their own arc calculator foe to find the same profit opportunities as you. Speed and accuracy are key.
• FP Reserves: You must have the forge points available in your inventory to make the investment calculated by the arc calculator foe.
• Owner Self-Investment: The amount the owner has already put in changes the “Secure Amount” math. Always update the “Current Invested” field.

Frequently Asked Questions (FAQ)

What is a 1.9 thread?

It is a social leveling system where players with Level 80 Arcs (90% bonus) contribute to each other’s buildings at cost, effectively paying 1.9x the base reward to ensure the owner pays as little as possible.

Does the Arc bonus apply to blueprints and medals?

Yes! The arc calculator foe logic applies to Blueprints and Medals as well, though most players focus primarily on the Forge Points.

Why does the calculator show a different number than my math?

Most likely due to the “floor” rounding rule in Forge of Empires. The arc calculator foe removes decimal points to match game logic.

What does “securing a spot” mean?

Securing or “locking” a spot means you have invested enough points that no other player can mathematically overtake your position, even if they filled the rest of the level.

Is it worth leveling the Arc past 80?

Yes. Every level past 80 increases your personal profit when participating in 1.9 threads. At level 180, your bonus is 100%, meaning you make a 10% profit on every 1.9 investment.

Can I use this for sniping?

Absolutely. The arc calculator foe is the primary tool for snipers to determine if an investment is profitable before someone else takes it.

Does the bonus apply to my own Great Buildings?

No. The Arc bonus only applies to rewards you receive from *other* players’ buildings. It does not increase the rewards people get from yours.

What is the “1.92 thread”?

These are elite threads for players with Level 130+ Arcs. They provide a higher bonus to help guildmates level even faster.