FoE GB Calculator

Forge of Empires Tools

Calculate the owner’s cost to level a Great Building after securing investor spots.

Reward Positions (P1-P5)

Please ensure all inputs are valid numbers.

Owner’s Total Forge Point Cost

Cost Distribution Chart

Chart illustrating the distribution of Forge Points between the owner and investors.

Investor Spot Analysis

Position	Base Reward (FP)	Investor Cost (FP)	Investor Profit (FP)

Breakdown of costs and profits for each investment position based on the specified Arc bonus. The “profit” is the net FP gain or loss for the investor, not including blueprints or other rewards.

What is a foe gb calculator?

A foe gb calculator (Forge of Empires Great Building Calculator) is a vital tool for players of the popular strategy game, Forge of Empires. It allows players to make informed decisions about investing their hard-earned Forge Points (FPs) into Great Buildings (GBs). The primary function of this calculator is to determine the costs and benefits for both the owner of a GB and the players who contribute to it. By analyzing the reward structure and the powerful effect of The Arc great building, this tool helps users optimize their FP spending, secure profitable investment spots, and accelerate their progress in the game. This calculator is essential for anyone serious about using a foe gb calculator to its full potential.

The Foe GB Calculator Formula and Explanation

The core of any foe gb calculator revolves around a simple but powerful formula that calculates how much an investor needs to pay to secure a spot on a Great Building. This calculation is heavily influenced by The Arc, a special Great Building that provides a percentage-based bonus on the rewards received from contributing to others’ GBs.

The primary formula is:

Investor Cost = Base Reward × (1 + Arc Bonus Percentage)

Once the costs for investors are known, we can calculate the net cost for the Great Building’s owner:

Owner’s Cost = Total FP Cost of Level – Sum of All Investor Costs

Variable Definitions

Variable	Meaning	Unit	Typical Range
Total FP Cost	The full amount of Forge Points needed to level the Great Building.	Forge Points (FP)	50 – 10,000+
Arc Bonus	The percentage bonus an investor gets from their Arc GB. A 90% bonus corresponds to the common “1.9 rate”.	Percentage (%)	0% – 90%+
Base Reward	The standard FP reward for taking a specific position (P1-P5) on a GB.	Forge Points (FP)	5 – 5,000+
Owner’s Cost	The net amount of FPs the GB owner must contribute after all investor spots are filled.	Forge Points (FP)	Varies

Practical Examples

Example 1: A Mid-Level Arc

Imagine a player is leveling their Arc from level 20 to 21. The total cost is 1,845 FP. They find investors in a “1.9 thread,” meaning everyone has a 90% Arc bonus.

• Inputs: Total Cost = 1845 FP, Arc Bonus = 90%
• Rewards: P1=850, P2=425, P3=210, P4=70, P5=20
• Calculations:
  • P1 Investor pays: 850 * 1.9 = 1615 FP
  • P2 Investor pays: 425 * 1.9 = 808 FP
  • And so on for P3-P5…
• Result: After all investor contributions are summed up, the owner’s remaining cost is significantly reduced, often to just a few hundred FP or less. Our foe gb calculator shows this instantly.

Example 2: Securing a High-Level Observatory

A player wants to level their Observatory. The cost is 3,200 FP. They secure investors at a 92% bonus rate (1.92).

• Inputs: Total Cost = 3200 FP, Arc Bonus = 92%
• Rewards: P1=1200, P2=600, P3=300, P4=100, P5=30
• Result: By inputting these values into the foe gb calculator, the owner can see their exact contribution needed. This prevents over- or under-funding the building and makes the leveling process smooth and efficient. It’s a key strategy for any GB investment strategy.

How to Use This foe gb calculator

Using this calculator is a straightforward process designed for speed and accuracy.

1. Enter Total FP Cost: Find the total Forge Points required for the Great Building’s next level and enter it into the “Total FP Cost for Level” field.
2. Set Investor Arc Bonus: Input the Arc bonus percentage of the investors you are working with. For standard 1.9 threads, enter “90”.
3. Input Reward Positions: Enter the base FP reward for each of the five contribution spots (P1 through P5).
4. Calculate: Click the “Calculate Cost” button.
5. Review Results: The calculator will immediately display the owner’s net cost as the primary result. It will also show a detailed breakdown of how much each investor will contribute and provide a table and chart for further analysis.

Key Factors That Affect GB Investment

• Your Arc Level: The single most important factor. A higher Arc level means you get better rewards when investing in others’ GBs, making it a cornerstone of FP generation. A guide to Arc leveling strategy is a must-read.
• 1.9 Threads (and other rates): Guilds and player groups often form “threads” where everyone agrees to contribute at a specific rate (e.g., 1.9). Participating in these is the most reliable way to level your GBs cheaply.
• Sniping: This is when another player contributes to a GB right after you, taking the spot you wanted for a lower cost. A good foe gb calculator helps you understand how to “secure” spots to prevent this.
• GB Choice: Not all Great Buildings are created equal. Prioritizing powerful GBs like The Arc, Castel del Monte, or Statue of Zeus provides a much better return on investment. See our top Great Buildings guide.
• Timing: Knowing when to post your GB for contributions is key. Posting in an active thread ensures your spots are filled quickly.
• Communication: Clearly communicating with your investors is crucial. Using the “Copy Results” feature of a foe gb calculator makes sharing the required amounts easy.

Frequently Asked Questions (FAQ)

1. What does “1.9” mean in Forge of Empires?

“1.9” refers to the practice of contributing to a Great Building at a rate of 1.9 times the base reward. This is possible for players who have a Level 80 Arc, which provides a 90% bonus on rewards (100% base + 90% bonus = 190% or 1.9).

2. Why is The Arc so important?

The Arc is the only Great Building that boosts the rewards you get from investing in other players’ GBs. It fundamentally changes the game’s economy, turning FP investment from a cost into a profitable enterprise. Every serious player should prioritize getting their Arc to at least level 80.

3. What is “sniping”?

Sniping is when a player with a higher Arc bonus than you contributes just enough FPs to a spot to overtake you, getting the same reward for a lower cost. Using a foe gb calculator to secure spots helps prevent this.

4. Is it ever profitable for an investor to contribute more than the base reward?

For the investor, the “profit” comes from the blueprints, medals, and the satisfaction of helping a friend or guildmate. In terms of pure Forge Points, they always pay more than they get back. The system is designed to benefit the GB owner by reducing their leveling cost.

5. What does it mean to “secure” or “lock” a spot?

It means the owner has put in enough of their own FPs so that an investor can add their amount for a specific spot without any risk of being sniped by another player.

6. Can I use this calculator for any Great Building?

Yes. The calculation logic is the same for all Great Buildings in Forge of Empires. You just need to input the correct total cost and reward values for the specific GB and level you are working on.

7. How do I find the total cost and rewards for a GB level?

The game’s interface shows you the rewards for each spot. For total costs across many levels, players often consult the official Forge of Empires Wiki or use tools like our GB level cost tool.

8. Why does the owner’s cost sometimes come out as a negative number?

If the owner’s cost is negative, it means the total contributions from investors at the given Arc rate exceed the total cost of the level. This is a “profit” for the owner in Forge Points! It’s rare but can happen on high-reward GBs with high-level Arc investors.

Related Tools and Internal Resources

Enhance your Forge of Empires gameplay with these other powerful tools and guides:

• GB Investment Guide – A deep dive into the best strategies for investing in Great Buildings.
• Arc Leveling Strategy – Learn the most efficient path to level your Arc for maximum returns.
• Top Great Buildings Tier List – Our ranking of all GBs to help you decide what to build next.
• FP Reward Analyzer – Analyze the profitability of different investment opportunities.
• City Layout Planner – Optimize the layout of your city for maximum efficiency.
• Complete Event Guide – Stay ahead of the curve with our guide to the latest game events.