FoE GB Calculator

The ultimate tool for planning your Forge of Empires Great Building investments and securing rewards.

Great Building Investment Calculator

Reward Spot FP Returns

Contribution Breakdown

This table details the required contribution for each reward spot based on your selected rate, and the profit for an investor with a 90% Arc bonus (standard 1.9). This analysis is key for any serious foe gb calculator user.

Position	Reward (FPs)	Required Contribution	Contributor Profit (at 1.9)	Secured?

What is a FoE GB Calculator?

A foe gb calculator (Forge of Empires Great Building Calculator) is an indispensable tool for any serious player aiming to efficiently level their Great Buildings (GBs). In Forge of Empires, players can contribute Forge Points (FPs) to each other’s GBs. When a GB levels up, the top contributors receive rewards, including FPs, medals, and blueprints. The foe gb calculator helps manage this process, particularly for popular contribution strategies like “1.9 threads.” It calculates how many FPs the owner of a GB needs to add to “secure” the top reward spots, ensuring their guildmates or friends can contribute safely without being “sniped” (overtaken by another player for a higher reward spot). This tool is crucial for maximizing rewards, minimizing costs, and fostering fair play within a guild.

FoE GB Calculator Formula and Mathematical Explanation

The core logic of any foe gb calculator revolves around a few simple formulas designed to ensure contribution spots are secure. The main goal is to calculate the owner’s “self-contribution” needed so that even if an outside player contributes the maximum remaining FPs, they cannot overtake a secured spot.

1. Contribution Calculation: The amount a contributor pays is based on the reward and the agreed-upon rate.

Contribution = Reward FPs * (Rate / 100)

2. Securing a Spot: To secure a spot, the owner must ensure that after a contributor adds their FPs, the remaining FPs needed to level the GB are less than the contributor’s investment. This prevents anyone from adding more and taking the spot. The “lock” formula is:

Owner’s Share = (Total FPs for Level – Current FPs) – (P1 Contribution * 2) + P1 Reward

A simpler, more general formula to determine if a spot is secure is by ensuring the gap to level is smaller than the amount needed to snipe. The foe gb calculator automates this complex but vital calculation for players.

Variables Table

Variable	Meaning	Unit	Typical Range
Total FPs	Total Forge Points needed for the GB to reach the next level.	FPs	100 – 10,000+
Reward FPs	The number of Forge Points returned as a reward for a specific position (P1-P5).	FPs	5 – 2,000+
Rate	The contribution multiplier, typically from an Arc bonus.	%	185% – 195% (1.85 – 1.95)
Owner’s Contribution	The FPs the GB owner must add to secure one or more spots.	FPs	Varies greatly

Practical Examples (Real-World Use Cases)

Example 1: Mid-Level Observatory

An Observatory is leveling up, requiring 648 FPs. The P1 reward is 85 FPs, and the guild uses a 1.9 (190%) thread. Using the foe gb calculator:

• Inputs: Total FPs=648, P1 Reward=85, Rate=190%.
• Calculation: P1 contribution is 85 * 1.9 = 162 FPs. To secure this, the owner must add FPs until the remaining amount is too small for a sniper. The calculator determines the owner needs to add 324 FPs.
• Output: Owner adds 324 FPs. Now 324 FPs are left. The P1 contributor adds 162 FPs. Now 162 FPs are left. No one can add more than 162 to snipe P1. The spot is secure.

Example 2: High-Level Arc Leveling

An Arc is leveling to 81, requiring 1,852 FPs. The P1 reward is a massive 972 FPs. The group uses a 1.9 thread. A foe gb calculator is essential here.

• Inputs: Total FPs=1852, P1 Reward=972, Rate=190%.
• Calculation: P1 contribution is 972 * 1.9 = 1847 FPs. To secure P1, the owner must add 1852 – 1847 = 5 FPs.
• Output: The owner adds just 5 FPs. The P1 contributor can then safely add their 1847 FPs, leveling the building instantly. This shows how a foe gb calculator helps identify very low owner costs on certain levels.

How to Use This foe gb calculator

1. Enter Total FPs: Input the total number of Forge Points required for the Great Building’s next level.
2. Set Contribution Rate: Enter the rate your group uses (e.g., 190 for 1.9, 185 for 1.85).
3. Input Rewards: Fill in the FP rewards for each of the five reward positions (P1 through P5).
4. Add Current FPs: Enter the amount of FPs already on the building, if any.
5. Review Results: The foe gb calculator will instantly show the “Owner’s FPs to Secure P1” as the main result. This is the minimum you need to add to make the top spot safe.
6. Analyze Breakdown: Check the table and chart to see the costs for each position, potential profits for investors, and whether spots are secured.
7. Copy and Share: Use the “Copy Results” button to easily paste the contribution amounts into your in-game chat for your guildmates.

Key Factors That Affect Great Building Results

• The Arc Bonus: This is the most significant factor. A higher Arc level means contributors pay a higher percentage, which can dramatically lower the owner’s share. The entire “1.9” system is based on players having a Level 80 Arc, which gives a 90% bonus on rewards.
• Total Level Cost: The total FP cost of a level directly impacts the owner’s share. Higher costs often require a larger owner investment to secure. Using a foe gb calculator is critical to manage these costs.
• Reward Structure: The distribution of rewards across P1-P5 is crucial. Some GBs have a very high P1 reward compared to P2, making P1 security the primary goal.
• Contribution Rate (1.8 vs 1.9 vs 1.9+): The rate used by your group determines everything. Higher rates are more beneficial for the GB owner, reducing their costs.
• Sniping: The risk of being “sniped” is the entire reason a foe gb calculator is necessary. A sniper adds just enough FPs to overtake a spot, causing the original investor to lose out. Securing prevents this.
• Self-Funding vs. Group-Funding: A player may choose to level a GB entirely on their own, but this is slow. Using a foe gb calculator facilitates group funding, which dramatically accelerates leveling speed.

Frequently Asked Questions (FAQ)

What does ‘securing’ a GB spot mean?

Securing a spot means the GB owner has contributed enough Forge Points themselves so that it becomes impossible for an outside player (a “sniper”) to overtake a contributor who is promised that spot. This is the primary function of a foe gb calculator.

Why does everyone use ‘1.9’?

The ‘1.9’ rate comes from the Arc Great Building. At level 80, the Arc provides a 90% bonus to rewards from contributing to other GBs. This means an investor gets 1.9 times the base reward back, breaking even. This created a stable, no-loss system for leveling, making it a community standard.

Is using a foe gb calculator cheating?

No, not at all. Using a foe gb calculator is considered a standard and necessary part of strategic gameplay. The game developers are aware of these tools, and they are widely accepted by the community.

What happens if I don’t secure a spot?

If you invite people to contribute without securing the spots, their positions could be sniped. This will likely upset your guildmates, who may have lost Forge Points, and damage your reputation as a reliable player.

Can this calculator handle rates other than 1.9?

Yes. This foe gb calculator is designed to be flexible. You can input any rate in the “Contribution Rate” field, such as 1.92, 1.85, or even 2.0 (200%), to match your group’s specific rules.

How do I find the total FP cost for a level?

You can find this information on the Forge of Empires Wiki or by using in-game helper tools. This foe gb calculator requires you to input this value manually.

What is ‘sniping’?

Sniping is when a player who was not invited to contribute to a GB adds Forge Points to steal a reward spot from an invited contributor, often by a very small margin. Securing spots with a foe gb calculator is the primary defense against sniping.

Which Great Building should I level first?

Most players recommend leveling the Arc first to at least level 80. This unlocks the 1.9 reward bonus, which is fundamental to the game’s modern economy and makes leveling all other GBs much cheaper.

Related Tools and Internal Resources

For more strategic planning in Forge of Empires, check out these other calculators and guides. Using a foe gb calculator is just the first step.