FoE Arc Calculator
Calculate secure spots, investor profit, and 1.9 leveling requirements for Great Buildings.
| Position | Base Reward | With Arc Bonus | Secure After (Owner FP) |
|---|
Reward Projection Chart
Visual representation of Base Reward vs. Bonus Adjusted Reward.
What is the FoE Arc Calculator?
The foe arc calculator is an essential tool for players of Forge of Empires who want to optimize their Great Building (GB) leveling. It calculates the specific amount of Forge Points (FP) required to secure positions in a building, ensuring that contributors get their rewards without being "sniped" by others. By using a foe arc calculator, guild members can cooperate in 1.9 leveling threads, which is the most efficient way to grow your city's power.
Who should use it? Any player who owns an Arc or plans to contribute to others' Great Buildings. Common misconceptions include the idea that you only need to match the base reward; in reality, with a high-level Arc, rewards are vastly multiplied, and the foe arc calculator helps you track these complex numbers easily.
FoE Arc Calculator Formula and Mathematical Explanation
The math behind the foe arc calculator relies on the specific Arc bonus percentage. The fundamental calculation for a position's reward is:
Total Reward = floor(Base Reward * (1 + (Arc Bonus / 100)))
To determine if a spot is "secure," the building owner must ensure that no other player can contribute more than the current target contributor. The formula used by the foe arc calculator for securing is:
Secure Amount = (Remaining FP + (Current Top Contributor – Next Contributor)) / 2
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Base Reward | Original spot payout | Forge Points | 5 – 5000 |
| Arc Bonus | The multiplier from the Arc | Percentage | 0% – 100%+ |
| 1.9 Rate | Standard guild leveling rate | Multiplier | 1.8 – 1.95 |
Practical Examples (Real-World Use Cases)
Example 1: An owner has a level 10 Cathedral of Aachen. The total cost to level is 640 FP. The P1 base reward is 50 FP. If using a 1.9 thread, the contributor expects 95 FP (50 * 1.9). The foe arc calculator will show that the owner needs to put in 450 FP themselves to make that 95 FP spot "un-snippable."
Example 2: You are sniping a neighbor. The base reward is 100 FP, and your Arc is level 80 (90% bonus). You see the building needs 300 more FP to level. By inputting these into the foe arc calculator, you find that a 190 FP contribution immediately secures the spot and nets you a profit if the current owner's investment is low enough.
How to Use This FoE Arc Calculator
- Enter the Total Level Cost of the Great Building found in the GB menu.
- Input your Current Investment (the amount of FP you have already put in).
- Locate the Base Reward for the specific position (P1, P2, etc.) from the rewards list.
- Adjust the Arc Bonus. For a standard 1.9 thread, this is 90%.
- Review the "Secure Amount" to see how much you need to pay before calling the spot in your guild chat.
The foe arc calculator provides real-time updates, allowing you to tweak numbers as you add FP to your building.
Key Factors That Affect FoE Arc Calculator Results
- Arc Level: Higher levels provide higher bonuses, changing the multiplier from 1.0 to over 2.0.
- Great Building Type: Different GBs have different reward structures (e.g., The Arc itself has much higher base rewards than a Zeus).
- Current Level: As GBs reach "the sweet spot" (levels 30-60), the owner's cost to secure decreases significantly.
- Sniping Activity: Neighbors can add FP at any time, which the foe arc calculator accounts for by adjusting the "remaining" value.
- Rounding Rules: FoE always rounds DOWN (floor) for rewards, a critical factor the foe arc calculator handles automatically.
- Contribution Rate: While 1.9 is standard, some elite guilds use 1.92 or 1.94, which significantly alters the required investment.
Frequently Asked Questions (FAQ)
Why does the foe arc calculator show I need to pay more than the reward?
This happens in lower levels where the cost to secure a spot is higher than the reward the investor receives. This is common before the "sweet spot."
What is a 1.9 contribution?
It means an investor with a level 80 Arc (90% bonus) contributes exactly the amount they will get back, resulting in a zero-profit, zero-loss transaction for them.
Can I use the foe arc calculator for my own Arc?
Yes, calculating your own Arc levels is the best way to see how much your bonus increases per level.
Is the foe arc calculator mobile friendly?
Yes, our tool is designed to work perfectly on both desktop and mobile devices.
What does "securing a spot" mean?
It means adding enough FP so that even if another player puts in all the remaining FP, they cannot overtake your position.
Does this tool work for all Great Buildings?
Absolutely. The math for rewards is consistent across all GBs in Forge of Empires.
What is the "sweet spot" in leveling?
The sweet spot is a range of levels where the rewards are so high that the owner has to pay very little or nothing to secure the top spots.
How do I calculate for P2 or P3?
Simply change the "Base Reward" input to the base value for that specific position.
Related Tools and Internal Resources
- Forge of Empires Strategy Guide – Learn advanced tactics beyond the foe arc calculator.
- FP Efficiency Tool – Analyze which GBs give the best return on investment.
- Great Building Data – A full database of level costs for use in your foe arc calculator.
- Arc Leveling Guide – Specific tips for getting your Arc to level 80 quickly.
- Guild Treasury Math – How the Arc bonus contributes to your guild's success.
- Forge Point Management – Best practices for storing and spending your FP.