Welcome to the most precise FoE Calculator on the web. Whether you are aiming to lock your Great Building (GB) spots or calculating the exact Forge Points (FPs) needed for a 1.9 thread, this tool is designed to optimize your growth and prevent sniping.
GB Investment & Lock Calculator
A) What is a FoE Calculator?
A FoE calculator is a specialized utility used by Forge of Empires players to manage Great Building contributions. In the modern "Arc Meta," players use these tools to calculate the "1.9 rate"—a standard where investors contribute the base reward of a position multiplied by 1.9 (the bonus provided by a Level 80 Arc).
Using this calculator ensures that the building owner knows exactly how many Forge Points they must self-invest to make a position "safe" from "sniping" (where an outside player takes a spot for less than the 1.9 value).
Figure 1: Comparison of Investor Costs vs. Base Rewards at various Arc levels.
B) Formula and Explanation
The math behind the 1.9 thread is straightforward but critical for high-level play. There are two primary formulas used in our calculator:
- Investor Contribution:
Base Reward × Arc Multiplier(usually 1.9). - The Lock Formula:
Total Level Cost - (2 × Investor Contribution). This determines the total Forge Points that must be on the building before the spot is mathematically impossible to overtake.
If the current investment on the building is less than the Lock Requirement, the owner must fill the gap (the Owner Shortfall) before posting the spot in a 1.9 thread.
C) Practical Examples
Example 1: The Statue of Zeus (Level 10 to 11)
Imagine your Zeus requires 600 FPs to level. The P1 base reward is 50 FPs. In a 1.9 thread, the investor pays 95 FPs (50 * 1.9). To lock this spot, the building needs 600 - (2 * 95) = 410 FPs already invested. If you have only put in 100 FPs, you still need to add 310 FPs to make P1 safe.
Example 2: The Arc (Level 29 to 30)
For a high-cost building like The Arc, precision is key. If P1 reward is 400 FPs and total cost is 2000 FPs, the investor pays 760 FPs. The lock requirement is 2000 - (2 * 760) = 480 FPs. Failing to calculate this correctly allows snipers to take P1 for 700 FPs, costing you 60 FPs and potentially blueprints.
D) How to Use step-by-step
- Total Level Cost: Look at your Great Building and find the total number of FPs required for the current level.
- Base Reward: Click the "Rank" icon to see what the base Forge Point reward is for the position you want to fill (P1, P2, etc.).
- Arc Multiplier: Select 1.9 (standard) or higher if you are in a specialized high-level guild.
- Current Investment: Enter how many FPs you (the owner) have already added.
- Check the Shortfall: The calculator will tell you exactly how many more FPs you need to add before it's safe to ask for an investment.
E) Key Factors in GB Investment
| Factor | Impact on Strategy | Recommended Action |
|---|---|---|
| Arc Level | Determines your personal profit margin. | Rush Arc to Level 80 ASAP. |
| Sniping | Leads to loss of FPs and Blueprints. | Always use a lock calculator. |
| 1.9 Threads | Fastest way to level buildings. | Join an active, disciplined guild. |
| Reward Brackets | P1 and P2 usually require the most "owner prep." | Prep P1 and P2 simultaneously. |
F) FAQ (Frequently Asked Questions)
1. What does 'locking' a spot mean?
It means you have invested enough FPs so that even if another player puts in 1 FP less than the current investor, they cannot overtake the spot.
2. Why 1.9?
A Level 80 Arc gives a 90% bonus. 1.0 (base) + 0.9 (bonus) = 1.9 multiplier. This is the equilibrium point for most guilds.
3. Can I use this for P3, P4, and P5?
Yes! Simply change the 'Base Reward' to match the reward for those specific positions.
4. What is a 'Sniper'?
A sniper is a player (usually not in your guild) who puts FPs into your building to make a profit, often taking a spot for less than the 1.9 value.
5. Should I ever pay more than 1.9?
Some 'power level' guilds use 1.92 or 1.94 threads to help members grow even faster, though this requires Arcs above level 100.
6. Does the calculator account for existing investors?
If there are already investors, subtract their FPs from the 'Total Level Cost' and the 'Current Investment' to recalculate for remaining spots.
7. Why is my 'Owner Shortfall' negative?
This means the spot is already locked! You can safely post it in your guild thread.
8. Is this tool mobile-friendly?
Absolutely. You can use it on your phone while playing the FoE mobile app.