Forge of Empires Calculator
An essential tool for Great Building (GB) leveling and investment planning.
Total Forge Points required to complete the current GB level.
The multiplier used in your guild/group for GB contributions.
Reward Positions (P1-P5)
What is a Forge of Empires Calculator?
A forge of empires calculator is a vital tool for players engaged in leveling their Great Buildings (GBs). Its primary purpose is to simplify the complex calculations involved in cooperative GB leveling, most commonly through a system known as the “1.9 thread” or similar rate-based contribution groups. Instead of manually calculating costs, players can quickly determine the exact amount of Forge Points (FPs) the GB owner needs to invest and how much each contributor should pay to secure a reward spot. This ensures fairness, efficiency, and helps everyone maximize their rewards.
This type of calculator is not for general city planning but specifically for the financial ecosystem of Great Building investment. It is used daily by players in active guilds to streamline the process of leveling some of the most powerful structures in the game, such as The Arc, Château Frontenac, or attack-boosting GBs. Using a reliable forge of empires calculator removes guesswork and prevents costly errors. Find out more about leveling strategies in our guide to Great Building leveling.
Forge of Empires Calculator Formula and Explanation
The logic behind the calculator is based on ensuring that contributors get a fair return on their investment, while the owner gets their GB leveled at a reduced cost. The core idea revolves around the “Arc Bonus,” which increases the rewards from contributing to other players’ GBs. The 1.9 rate is derived from a Level 80 Arc, which gives a 90% bonus on rewards.
The two main formulas are:
- Contributor’s Secure Cost: `Secure Cost (FP) = Reward (FP) * Rate`
- Owner’s Final Cost: `Owner’s Cost (FP) = Total Level Cost (FP) – Sum of All Base Rewards (P1 to P5)`
This system ensures that if a contributor pays the `Secure Cost`, they will receive back their initial investment plus the base reward, effectively earning FPs. The owner benefits by having a large portion of the leveling cost covered by others. To make the most of this, you might want to use our FoE City Planner to see which GBs to focus on.
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Total FP Cost | The total Forge Points needed to complete one level of a Great Building. | Forge Points (FP) | 100 – 50,000+ |
| Reward | The base Forge Points awarded for securing a specific position (e.g., P1). | Forge Points (FP) | 10 – 5,000+ |
| Rate | The agreed-upon multiplier for calculating contributor costs (e.g., 1.9). | Unitless Ratio | 1.8 – 1.95 |
| Owner’s Cost | The net amount of Forge Points the building’s owner must personally invest. | Forge Points (FP) | Varies greatly |
Practical Examples
Example 1: Leveling a High-Level Arc
A player wants to level their Arc from 80 to 81. They are in a standard 1.9 contribution group.
- Inputs:
- Total FP Cost: 7,930 FP
- P1 Reward: 1,427 FP
- P2 Reward: 469 FP
- P3 Reward: 159 FP
- P4 Reward: 53 FP
- P5 Reward: 18 FP
- Rate: 1.9
- Results from our forge of empires calculator:
- Owner’s Final Cost: 7930 – (1427 + 469 + 159 + 53 + 18) = 5,804 FP
- P1 Contributor Pays: 1427 * 1.9 = 2,711 FP
- P2 Contributor Pays: 469 * 1.9 = 891 FP
Example 2: Leveling a Mid-Level Castle del Monte
A player is leveling their Castle del Monte from 30 to 31. They are in a 1.85 group.
- Inputs:
- Total FP Cost: 1,234 FP
- P1 Reward: 200 FP
- P2 Reward: 100 FP
- P3 Reward: 50 FP
- P4 Reward: 25 FP
- P5 Reward: 10 FP
- Rate: 1.85
- Results:
- Owner’s Final Cost: 1234 – (200 + 100 + 50 + 25 + 10) = 849 FP
- P1 Contributor Pays: 200 * 1.85 = 370 FP
Efficiently managing these costs is a key part of the game. For other ways to optimize, check out our FoE Secure Spot Calculator.
How to Use This Forge of Empires Calculator
Using this tool is straightforward and designed for speed.
- Enter Total FP Cost: Find the total Forge Points required for the GB level you are working on and enter it in the first field.
- Select Contribution Rate: Choose the rate your group uses from the dropdown. 1.9 is the most common, but others are used.
- Input Rewards: Enter the base FP reward for each of the top 5 positions (P1 through P5).
- Review Results: The calculator will instantly update. The main result is the “Owner’s Final Cost,” which is your personal investment. The table below shows what each contributor needs to pay.
- Use The Chart: The bar chart provides a visual breakdown of the costs, showing the owner’s share versus the total covered by contributors.
The “Copy Results” button is perfect for pasting into in-game messages or guild Discord servers. You can also compare different GBs using the GB Comparison Tool to decide where to invest next.
Key Factors That Affect GB Investment
Several factors can influence the cost and benefit of leveling a Great Building.
- The Arc Level: The single most important factor. A higher level Arc provides a larger bonus to rewards, making it cheaper for everyone to contribute. This is why getting an Arc to level 80 is a primary goal for serious players.
- Guild Activity: A more active guild will have more players willing to take spots on your GBs, allowing you to level them faster.
- Contribution Rate (1.9, 1.85, etc.): The rate determines the cost for contributors. A lower rate is cheaper for them but provides less of a “discount” to the owner, as the profit margin is smaller.
- GB Level: As GBs increase in level, their FP costs and rewards scale significantly. The forge of empires calculator is most useful for these higher, more expensive levels.
- Sniping: This is when another player contributes more than the intended person to steal a reward spot. Properly securing spots (locking) by having the owner pre-fund a certain amount is crucial to prevent this.
- Forge Point Supply: Your daily FP production and inventory directly impact how quickly you can cover your “Owner’s Cost” and continue leveling. Managing this is key, and our Forge Point Calculator can help forecast your income.
Frequently Asked Questions
What does “1.9” actually mean?
It refers to multiplying the base reward by 1.9. This rate comes from the 90% bonus a Level 80 Arc provides (100% base + 90% bonus = 190%, or 1.9).
Why is the Owner’s Cost not just the total minus the secure costs?
Because the secure cost includes the contributor’s profit. The owner’s cost is based on the *base rewards* being covered, not what contributors actually pay.
Is it always best to use a 1.9 thread?
For the GB owner, yes, as it provides the biggest discount. For contributors, it’s a great way to earn FPs. It’s the most common and efficient system for cooperative leveling.
How do I prevent my spots from being “sniped”?
You must “secure” or “lock” the spots. This involves the owner adding enough of their own FPs so that an outsider cannot possibly overtake the intended contributor for a higher spot. A dedicated secure spot calculator can determine this exact amount.
What if my guild uses a different rate, like 1.85?
Our forge of empires calculator includes a dropdown to select common rates like 1.85 and 1.8, so you can adapt the calculations to your group’s specific rules.
Does this calculator work for all Great Buildings?
Yes, the math is the same for any GB. You just need to input the correct Total FP Cost and reward amounts for the specific building and level you are working on.
What does the “Net Profit” in the table mean?
Net Profit is the amount of Forge Points a contributor gains. It’s the difference between the Base Reward they receive and the amount of their own FPs they had to add to the secure cost (Secure Cost – Base Reward).
Why does the chart show “Total Contributor Share” instead of individual payments?
The chart visualizes the fundamental cost split: how much the owner pays versus the total amount covered by all contributors combined (which equals the sum of the base rewards). It simplifies the core financial benefit of using a contribution thread.