Forge Of Empires Great Buildings Calculator






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Forge of Empires Great Buildings Calculator

Use this forge of empires great buildings calculator to find the Forge Point (FP) costs for leveling your buildings. This tool helps you understand the owner’s cost after accounting for contributions from a 1.9 thread or other investor rates.



Choose the Great Building you want to level.


The current level of your Great Building.



The level you want to reach.



The bonus investors get from their Arc (e.g., 90 for a 1.9 rate).



Total Owner Cost for Levels 10 to 20

… FP

Total FPs Required

Total Investor Contributions

Owner FP Savings

Detailed Level-by-Level Breakdown


Level Total FPs P1 Cost P2 Cost P3 Cost P4 Cost P5 Cost Owner Cost
This table shows the costs for each individual level. “P1-P5 Cost” is what an investor pays. “Owner Cost” is your net contribution.
Chart comparing the Owner’s FP cost vs. Total Contributions from investors for each level.

What is a Forge of Empires Great Buildings Calculator?

A forge of empires great buildings calculator is an essential tool for any serious Forge of Empires player. It helps you calculate the Forge Point (FP) investment required to level up your Great Buildings (GBs). More importantly, it shows you the net cost you, as the owner, will have to pay after accounting for the contributions from other players, typically through a “1.9 thread”. These threads are a cornerstone of efficient GB leveling, where players with a high-level Arc (usually level 80, providing a 90% reward bonus) contribute to your GB. They pay 1.9 times the base reward for a spot and, thanks to their Arc bonus, get all their invested FPs back. This makes leveling your GBs much faster and cheaper. This forge of empires great buildings calculator automates these complex calculations for you.

Anyone looking to efficiently level their Great Buildings should use this tool. Common misconceptions include thinking you need to fund the entire leveling process yourself or that swap threads are the most efficient method. For most players, a 1.9 contribution system, modeled by this forge of empires great buildings calculator, is far superior.

Forge of Empires Great Buildings Calculator: Formula and Mathematical Explanation

The core logic of this forge of empires great buildings calculator revolves around the 1.9 investment strategy. Here’s a step-by-step breakdown of the math:

  1. Total Cost (TC): Each level of a Great Building has a fixed total FP cost. This is our starting point.
  2. Investor Reward (R): The game provides a base FP reward for the top 5 contributors (P1 to P5) when a level is completed.
  3. Investor Contribution (IC): An investor with an Arc bonus contributes a multiple of the reward. For a 90% Arc bonus, the factor is 1.9. So, `IC = R * (1 + ArcBonus / 100)`.
  4. Total Contributions (SumIC): This is the sum of all five investor contributions: `SumIC = IC_P1 + IC_P2 + IC_P3 + IC_P4 + IC_P5`.
  5. Owner’s Net Cost (OC): This is the final value you need. It’s the total cost minus what all investors have paid: `OC = TC – SumIC`.

This forge of empires great buildings calculator performs this calculation for every level in your desired range, giving you a precise total cost. This method is often called “organized sniping” because it creates a secure system for contributors.

Variable Meaning Unit Typical Range
TC Total Cost to level the GB Forge Points (FP) 100 – 100,000+
ArcBonus The investor’s Arc bonus percentage % 0% – 94%+
R Base FP reward for a position Forge Points (FP) 5 – 1,000+
OC Owner’s Net Cost Forge Points (FP) Varies greatly

Practical Examples (Real-World Use Cases)

Example 1: Leveling an Arc from 79 to 80

This is a classic goal for many players. Using the forge of empires great buildings calculator, we input ‘The Arc’, current level 79, target 80, and a 90% investor bonus. The total cost is 1,733 FP. The rewards are high, so investor contributions total 1,606 FP. The owner’s net cost is only 127 FP. This demonstrates the immense power of the 1.9 system for expensive levels.

Example 2: Early Leveling of a Castel del Monte (CdM)

Let’s say you’re leveling a CdM from level 10 to 11. The total cost is 430 FP. Using the forge of empires great buildings calculator with a 90% investor bonus, the total investor contribution is 228 FP. Your net cost as the owner is 202 FP. While not as dramatic as the Arc example, it still saves you more than half the cost, allowing for much faster progression.

How to Use This Forge of Empires Great Buildings Calculator

  1. Select the Great Building: Choose the GB you plan to level from the dropdown menu.
  2. Enter Levels: Input the GB’s current level and the target level you want to reach.
  3. Set Investor Bonus: Enter the Arc bonus of your investors. 90% is standard for 1.9 threads, but you can customize it.
  4. Review the Results: The calculator instantly shows the total net cost for you in the primary result area.
  5. Analyze the Breakdown: The table below shows the costs for each level, including what each of the top 5 investors will pay and your specific cost for that single level. This helps in planning your daily FP spending.
  6. Visualize with the Chart: The chart provides a quick comparison of your costs versus what investors are contributing, highlighting the savings. Using a tool like this is a key tip for beginners and advanced players alike.

Key Factors That Affect Forge of Empires Great Buildings Calculator Results

  • The Great Building Itself: Different GBs have vastly different cost-to-reward ratios. Attack buildings like Zeus or Castel del Monte are a priority for many.
  • The Level Range: Higher levels are exponentially more expensive but also offer higher rewards, making the 1.9 system even more effective.
  • The Investor Arc Bonus: The higher the bonus (e.g., 1.9, 1.92, etc.), the more investors pay, and the less you pay. This is the central mechanic of a 1.9 thread.
  • Securing Spots: The owner must sometimes add FPs to “secure” or “lock” a spot, ensuring an investor cannot be outbid (“sniped”). This forge of empires great buildings calculator assumes spots are secured for simplicity, focusing on the final net cost.
  • Recurring Quests (RQs): Completing RQs can provide extra FPs, which can offset the owner’s cost further. This is an external factor not included in the calculator’s direct math but important for overall strategy.
  • Blueprint Availability: While not a cost factor, the need for blueprints is why many players invest in other GBs in the first place, creating the supply of investors.

Frequently Asked Questions (FAQ)

What does “1.9 thread” mean?

It refers to a group of players, usually in a guild or friends list, who agree to invest in each other’s Great Buildings. The “1.9” comes from the 90% reward bonus provided by a level 80 Arc, meaning investors contribute 1.9 times the base FP reward for a spot.

Why is a Level 80 Arc so important?

At level 80, The Arc gives a 90% bonus on GB rewards. This means when an investor contributes 1.9 times the reward, they receive exactly their investment back when the level flips, making it a “no-loss” way to gain blueprints and medals. This is a critical concept for any user of a forge of empires great buildings calculator.

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

Securing a spot means the GB owner adds enough of their own FPs so that an investor’s contribution cannot be “sniped” by another player. This guarantees the investor gets the reward they paid for.

Can I use this calculator for other rates like 1.85 or 1.92?

Yes. Simply change the “Investor Arc Bonus (%)” input. For a 1.85 rate, enter 85. For 1.92, enter 92. The forge of empires great buildings calculator will adjust all figures accordingly.

Is it better to use a 1.9 thread or a swap thread?

For leveling your own GBs, a 1.9 thread is almost always cheaper and faster than a direct FP swap thread. Swaps are a 1-for-1 trade, while 1.9 threads generate “free” FPs for the owner from investor bonuses.

What if I don’t have enough investors?

You can ask in your guild or look for spots to take in other players’ buildings to earn blueprints. Being in an active guild is crucial for accessing a reliable 1.9 thread.

Which Great Building should I level first?

Most guides recommend the “fighting trinity” first: Zeus, Cathedral of Aachen, and Castel del Monte. After that, getting The Arc to level 80 is a top priority. You can use a forge of empires great buildings calculator to compare the costs.

Where does the data in this forge of empires great buildings calculator come from?

The data for Great Building costs and rewards is based on publicly available information from the Forge of Empires Wiki and community-driven data sources, ensuring accuracy for this forge of empires great buildings calculator.

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