Foe Great Buildings Calculator

Optimize your Forge Point contributions and secure investment spots with our advanced foe great buildings calculator.

GB Investment Calculator

Reward Positions (P1-P5)

Owner FP to Secure P1
0

Formula: Owner FP to Secure P1 = (Total FP Cost – Current Contribution) – (P2 Cost + P3 Cost + P4 Cost + P5 Cost). A spot is “secure” when the remaining FP on the GB is less than the investor cost for the next highest spot plus the current spot’s cost. This foe great buildings calculator simplifies this complex calculation for you.

Position	Reward (FP)	Investor Cost (FP)	FP to Secure	Status

Detailed breakdown of investor costs and security status for each position. This table is a core feature of any effective foe great buildings calculator.

What is a Foe Great Buildings Calculator?

A foe great buildings calculator (or FoE GB calculator) is an indispensable tool for players of the popular strategy game Forge of Empires. Its primary purpose is to simplify the complex mathematics involved in leveling up Great Buildings (GBs), especially when utilizing investor groups or “1.9 threads.” This calculator helps the owner of a GB determine the exact number of Forge Points (FPs) they need to contribute to “secure” the reward positions for other players who invest at a specific rate (e.g., 1.9 times the reward).

Anyone who wants to level their Great Buildings efficiently should use a foe great buildings calculator. It’s particularly crucial for players participating in guild-based 1.9 threads, where accuracy is key to maintaining trust and speed. A common misconception is that these calculators are only for high-level players with a level 80 Arc. In reality, even players with lower-level Arcs or those self-leveling can use the tool to understand costs and plan their FP spending more effectively. A good foe great buildings calculator saves time, prevents costly errors, and maximizes leveling efficiency.

Foe Great Buildings Calculator Formula and Mathematical Explanation

The core logic of a foe great buildings calculator revolves around ensuring an investor’s spot cannot be “sniped” by another player. A spot is considered “secure” or “locked” when the remaining Forge Points needed to level the building are less than the sum of the cost for that spot and the cost for the next highest spot. The fundamental formula for an investor’s cost is:

Investor Cost = FP Reward × Investor Rate

For example, in a “1.9 thread,” an investor pays 1.9 times the base FP reward for a spot. The calculator’s main job is to determine the owner’s contribution required to make these spots safe for investors. It calculates the total cost of all but the highest spot (e.g., P2 through P5) and subtracts this from the total remaining FP, telling the owner exactly what to add to lock P1.

Variables Table

Variable	Meaning	Unit	Typical Range
Total FP for Level	The total Forge Points required to complete the building’s level.	FP	50 – 10,000+
Owner’s Contribution	The number of FPs already invested by the building’s owner.	FP	0 – Total FP Cost
Investor Rate	The multiplier used to calculate an investor’s cost (e.g., 1.9 for a 90% Arc bonus).	Multiplier	1.8 – 2.0
FP Reward	The base number of Forge Points awarded for securing a specific position (P1-P5).	FP	5 – 2,000+

Understanding these variables is key to using a foe great buildings calculator correctly.

Practical Examples (Real-World Use Cases)

Example 1: Leveling a High-Level Arc

Imagine you are leveling your Arc from 79 to 80. The total cost is 5,425 FP. You are using a 1.9 thread. The foe great buildings calculator would be used as follows:

• Inputs: Total FP: 5425, P1 Reward: 1000, P2 Reward: 500, P3: 250, P4: 100, P5: 30, Rate: 1.9.
• Calculation: The calculator determines the cost for P2-P5 investors (950 + 475 + 190 + 57 = 1672 FP). To secure P1, the owner must contribute enough so the remaining FP is less than the P1 investor’s cost (1900 FP). The calculator computes the owner’s share to be 5425 – 1672 = 3753 FP.
• Financial Interpretation: By contributing 3753 FP, the owner can confidently announce the P1-P5 spots in their 1.9 thread, knowing each investor is guaranteed their position. The owner’s net cost is significantly reduced thanks to the investors. Our FoE investment calculator can further break down these returns.

Example 2: A Mid-Level Player’s Zeus

A player is taking their Statue of Zeus from level 10 to 11, which costs 851 FP.

• Inputs: Total FP: 851, P1 Reward: 120, P2 Reward: 60, P3: 20, P4: 5, P5: 0, Rate: 1.9.
• Calculation: The foe great buildings calculator finds the cost for investors P2, P3, and P4 (114 + 38 + 10 = 162 FP). The owner’s share to level the building is 851 – 162 = 689 FP. To secure P1 (cost 228 FP), the owner must add FP until the amount remaining is less than P1 cost + P2 cost. The calculator simplifies this, showing the owner the exact “add FP” amount needed.
• Financial Interpretation: For a mid-level player, 689 FP is a large investment. The calculator shows how leveraging a 1.9 thread makes leveling iconic buildings like Zeus much more attainable. This is a primary function of any serious foe great buildings calculator.

How to Use This Foe Great Buildings Calculator

1. Enter Total FP Cost: Input the total Forge Points needed for the GB’s current level. You can find this in-game or via the Forge of Empires Wiki.
2. Add Owner’s Contribution: If you’ve already added FPs, enter the amount. Set to 0 if starting fresh.
3. Set Investor Rate: Adjust the rate to match your thread (e.g., 1.9, 1.85, 1.92).
4. Input Rewards: Enter the base FP rewards for positions 1 through 5.
5. Read the Results: The calculator instantly shows the “Owner FP to Secure P1” as the primary result. The table below provides a detailed breakdown, showing the investor cost for each spot and its security status.
6. Decision-Making: Use the output to decide how many FPs to add to your GB before posting it to an investment thread. The “FP to Secure” column tells you exactly how much you need to add to lock each successive spot. For more advanced strategies, check out our Great Building leveling guide.

Using this foe great buildings calculator removes guesswork and ensures smooth, efficient transactions within your guild or investment groups.

Key Factors That Affect Foe Great Buildings Calculator Results

• The Arc Bonus: The single most important factor. The “Investor Rate” is a direct result of the Arc’s contribution reward bonus. A level 80 Arc provides a 90% bonus, creating the standard 1.9 rate. Higher Arcs lead to higher rates (1.92, 1.95, etc.).
• GB Level: As a GB’s level increases, the total FP cost and the rewards for P1-P5 also increase dramatically. This makes using a foe great buildings calculator even more critical for higher levels.
• Total FP Cost of the Level: The fundamental number from which all other calculations are derived. Different GBs have different cost curves.
• Owner’s Contribution: The amount you’ve already put in directly reduces the amount needed from both you and investors. A higher initial contribution can make spots secure faster.
• Number of Reward Spots: While most have 5 spots, some very low levels have fewer. The calculator’s accuracy depends on accounting for all available reward positions.
• Sniping: The risk of “sniping” (another player taking a reward spot for fewer FPs than the intended investor) is the entire reason for using a foe great buildings calculator. The calculations are designed to prevent this by ensuring the spot is mathematically locked. See our FoE city building strategy guide for more on this.

Frequently Asked Questions (FAQ)

1. What is a “1.9 thread”?

A “1.9 thread” is a group of players (usually in a guild) who agree to invest in each other’s Great Buildings at a rate of 1.9 times the reward. This is possible for players with a level 80+ Arc, as they get a 90% bonus on FP rewards, allowing them to break even or profit. A foe great buildings calculator is essential for participating.

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

A spot is secured when the owner has contributed enough FPs that an investor can add their share without risk of being “sniped” by someone else. Our foe great buildings calculator determines this precise FP amount.

3. Can I use this calculator if my Arc is not level 80?

Yes. You can use it to see how much it would cost you to level a GB if you paid others to take spots. You can also use the FoE rewards calculator to see what your own returns would be when investing in others.

4. Why do some guilds use 1.92 or other rates?

As players level their Arcs beyond 80, the bonus continues to increase. Guilds with many high-level Arcs may establish threads with higher rates (like 1.92 for a level 100 Arc) for even greater efficiency.

5. Is the foe great buildings calculator useful for self-leveling?

While its main function is for investor threads, it can still be useful. It can show you the total cost breakdown, helping you understand the “opportunity cost” of not using investors.

6. Where do I find the total FP cost and rewards for a GB?

This information is available in-game by clicking on the GB. For planning future levels, the Forge of Empires Wiki is an excellent and accurate resource.

7. What happens if someone puts in the wrong amount of FP?

If an investor underpays, the spot may not be truly locked, and they risk being sniped. If they overpay, they lose FPs. Accuracy is paramount, which is why a reliable foe great buildings calculator is so important.

8. Does this tool work for all Great Buildings?

Yes. The calculation logic is the same for any Great Building in Forge of Empires, from a Statue of Zeus to a Star Gazer. All you need are the correct FP costs and rewards for the specific level. Check our FoE Goods Calculator for another useful tool.

Related Tools and Internal Resources

• FoE Rewards Calculator: Calculate the profitability of investing in other players’ Great Buildings based on your own Arc level. A perfect companion to this foe great buildings calculator.
• Forge of Empires 1.9 Calculator: A simplified version focused purely on 1.9 thread investments and returns.
• Great Building Leveling Guide: A comprehensive guide covering strategies from self-leveling to advanced 1.9 thread management.
• FoE Battle Calculator: Optimize your army compositions and predict battle outcomes in Guild Battlegrounds or Guild Expedition.
• Advanced City Planning Guide: Learn how to maximize your city’s efficiency with optimal layouts and building choices.
• FoE Era Advancement Tips: A strategic guide on when and how to advance through the ages in Forge of Empires.