Enter the FP cost, bonus percentage, and GB level into the FOE Calculator GB to determine your net FP contribution.

## Great Building Contribution Calculation Formula

The following formula is used to calculate the net FP contribution for your Great Building:

Net FP = FP Cost * (1 + Bonus Percentage / 100)

Variables:

- Net FP is the net Forge Points you contribute.
- FP Cost is the total Forge Points required for the contribution.
- Bonus Percentage is the percentage bonus from the GB level.

To calculate the net FP, multiply the FP cost by the bonus percentage and add the result to the FP cost.

## What is Great Building Contribution?

Great Building contribution refers to the process of donating Forge Points (FP) to a Great Building (GB) in Forge of Empires. Each contribution helps to level up the GB, providing various benefits to the player. Understanding the FP cost, bonus percentages, and the resulting net FP is crucial for efficient GB leveling.

## How to Calculate Net FP Contribution?

The following steps outline how to calculate the net FP contribution using the given formula:

- First, determine your FP cost based on the Great Building’s current level and required Forge Points.
- Next, determine the applicable bonus percentage from the GB level.
- Use the formula from above: Net FP = FP Cost * (1 + Bonus Percentage / 100).
- Finally, calculate the net FP by plugging in the values.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem:**

Use the following variables as an example problem to test your knowledge:

FP Cost = 1,000

Bonus Percentage = 10%

GB Level = 5

## FAQ

**1. What is FP cost?**

FP cost is the total number of Forge Points required to contribute to a Great Building.

**2. How is net FP different from gross FP?**

Net FP is the amount of Forge Points you actually contribute after considering bonuses from the GB level.

**3. How often should I use the FOE calculator?**

It’s helpful to use the FOE calculator whenever there’s a change in your GB level, bonus percentages, or if you want to maximize your FP contributions efficiently.

**4. Can this calculator be used for different Great Buildings?**

Yes, you can adjust the FP cost and bonus percentage fields to match any Great Building in Forge of Empires.

**5. Is the calculator accurate?**

The calculator provides an estimate of your net FP contribution based on the inputs provided. For exact figures, itâ€™s best to check in-game values or consult with your guildmates.