Forge of Empires (FoE) 1.9 Calculator
The essential tool for Great Building (GB) investment and leveling using the 1.9 method.
Choose the Great Building you are leveling.
Enter the level your GB will become *after* this one is complete.
The number of Forge Points you have already put into this level.
This is ’90’ for a standard 1.9 thread. Adjust for other rates (e.g., 85 for 1.85).
| Position | Reward (FP) | Investor Pays (FP) | Owner Needs to Add (FP) |
|---|
FP Contribution Breakdown
What is the Forge of Empires 1.9 Calculator?
The 1.9 calculator for FoE is an essential tool for players participating in “1.9 Threads” or similar Forge Point (FP) contribution groups. Its primary purpose is to calculate the exact number of FPs a Great Building (GB) owner must contribute to their own building to “secure” the top reward spots. This allows other players, typically those with a level 80+ Arc providing a 90% reward bonus (hence the “1.9” name), to take those spots for a fixed, fair price without risk of being outbid or “sniped.”
This calculator is vital for both GB owners looking to level their buildings cheaply and for investors seeking profitable blueprints and medals. Using a 1.9 calculator for foe ensures the system runs smoothly and efficiently, forming the backbone of one of the most powerful leveling strategies in Forge of Empires. Proper use accelerates GB growth far beyond what would be possible through self-leveling or random contributions.
The 1.9 Calculator Formula and Explanation
The logic behind the calculator seems complex, but it’s based on a simple principle: ensuring a contributor’s investment is safe. The key calculation is determining the “lock” value for each reward position.
The two main formulas are:
- Investor’s Cost: `Investor Cost = Base Reward for Position * (1 + Arc Bonus / 100)`
- Owner’s FP to Secure a Position (Pn): This is more complex. A simplified way to think about it is that the owner must add enough FPs so that the remaining amount needed to level is exactly twice the value of all remaining investor rewards. The amount needed to lock a spot `P(n)` is `(Total Level Cost – Sum of Rewards for P1 to P(n-1)) – 2 * (Reward P(n))`. The total amount the owner must contribute is derived from these individual lock calculations.
This calculator automates that entire process. It determines the total FPs you, the owner, need to add to your GB so you can post all 5 spots in your 1.9 thread at once.
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| GB Level Cost | The total number of Forge Points required to complete a specific level of a Great Building. | Forge Points (FP) | ~100 to >100,000 |
| Base Reward | The standard FP reward for a contribution spot (P1-P5) before any Arc bonus is applied. | Forge Points (FP) | 5 to >10,000 |
| Arc Bonus | The percentage bonus an investor receives on their rewards, provided by their Arc GB. | Percentage (%) | 0% to 90%+ (for 1.9) |
| Owner’s Share | The amount of FPs the GB owner must contribute themselves to make the 1.9 system work. | Forge Points (FP) | Varies greatly |
Practical Examples
Example 1: Leveling an Arc to 11
A player wants to level their Arc from 10 to 11. They have 0 FP invested so far.
- Inputs: Great Building: Arc, Advancing to Level: 11, Owner’s FP: 0, Arc Bonus: 90%
- Calculation: The calculator finds the total cost for level 11 (840 FP) and the rewards. It then calculates that the owner must add 175 FP to secure all 5 spots.
- Results: The P1 investor pays 266 FP, P2 pays 133 FP, etc. The owner’s total cost is drastically reduced compared to self-leveling. You can check this calculation with our FP Investment Calculator.
Example 2: Securing a high-level Castel del Monte
A player is leveling their Castel del Monte to level 61 and has already added 5,000 FP. How many more do they need to add to lock the spots?
- Inputs: Great Building: Castel del Monte, Advancing to Level: 61, Owner’s FP: 5000, Arc Bonus: 90%
- Calculation: The total cost is very high (31,090 FP). The calculator subtracts the owner’s 5,000 FP and then determines the remaining amount needed to secure the spots.
- Results: The calculator shows the owner needs to add 2,745 more FP. This precise number, provided by a reliable 1.9 calculator foe tool, is critical for such an expensive level.
How to Use This 1.9 Calculator for FoE
- Select the Great Building: Choose your GB from the dropdown menu. This is crucial as costs and rewards differ for each.
- Enter the Target Level: Input the level your GB will become once finished (e.g., if you are working on level 9, enter 10).
- Input Your Current FP: Add the Forge Points you have already contributed to this level. If none, leave it at 0.
- Set the Investor’s Bonus: It defaults to 90% for a standard 1.9 thread. Change it if your group uses a different rate (e.g., 85% for a 1.85 thread).
- Interpret the Results: The calculator instantly shows the total FP you need to add to secure all spots (“Owner FP needed”). The table below breaks down what each investor will pay and the portion you need to add for each spot to be secured.
- Use the Chart: The dynamic pie chart gives a simple visual of who is contributing what: your share, and the share of the top 5 investors.
Key Factors That Affect 1.9 Calculations
- Great Building Type: Each GB has a unique cost and reward schedule per level. An Arc is different from a Chateau Frontenac.
- GB Level: The most significant factor. As levels increase, FP costs and rewards grow exponentially, making a 1.9 calculator foe indispensable.
- Arc Bonus Rate: The entire system hinges on this. A 1.92 thread requires different calculations than a 1.9 or 1.85 thread.
- Owner’s Prior Investment: The amount you’ve already put in directly reduces the amount you still need to add to secure the spots.
- Number of Reward Spots: While most threads use 5 spots, some may only fill 3 or 4. This calculator focuses on the top 5, which is standard.
- Sniping: The core purpose of the calculation is to set the owner’s contribution just high enough to prevent another player from profitably taking a spot from an intended 1.9 investor. For more on this, see our guide on anti-snipe protection.
Frequently Asked Questions (FAQ)
What does “1.9” actually mean?
It refers to the 190% total return (100% of the base reward + 90% bonus) that an investor with a level 80 Arc receives when contributing to another player’s GB.
Why can’t I just self-level my Great Buildings?
You can, but it is incredibly expensive. Using a 1.9 thread and this 1.9 calculator for FoE makes the owner’s net cost to level a GB a fraction of the total, as investors cover the majority of the FP cost.
What does it mean to “secure” or “lock” a spot?
It means the owner has put in enough FPs that no outside player can contribute and profitably push the intended 1.9 investor out of their reward spot.
Is this calculator useful if my guild uses a 1.85 or 1.92 thread?
Yes. Simply change the “Investor’s Reward Bonus (%)” field to 85 for a 1.85 thread, or 92 for a 1.92 thread. The math adapts automatically.
What happens if I enter the wrong amount of currently invested FP?
The calculation will be incorrect. You might either overpay, wasting your own FPs, or underpay, leaving the spots vulnerable to being sniped. Accuracy is key.
Does this calculator work for all Great Buildings?
Yes, it includes the cost and reward data for all current Great Buildings in Forge of Empires.
Why does the owner need to contribute anything at all?
The owner’s contribution covers the gap between the total cost of the level and the sum of what the investors pay. Without the owner’s share, the level would never be completed.
Where can I find players to participate in a 1.9 thread?
Most active guilds have dedicated 1.9 threads. If yours doesn’t, you can often find groups on social media or official game forums. A Great Building optimizer can help you decide which GBs to focus on.