Forge of Empires Arc Calculator (Arche Rechner)
Calculate boosted Forge Point rewards for ranking spots 1-5 using your Arc bonus. Great for 1.9, 1.8, or custom investment threads.
What Is a FOE Arche Rechner?
A foe arche rechner is a calculator used by Forge of Empires players to quickly determine how many Forge Points each ranked contributor should invest on a Great Building. It is mainly focused on The Arc, because Arc bonus increases the rewards you receive from positions 1 through 5.
Instead of doing manual math every time, you can enter your Arc bonus and the base reward values and instantly get the boosted numbers. This helps with donation threads, fair trades, and sniping decisions.
Why Arc Bonus Changes Everything
If your Arc provides +90% reward bonus, every base Forge Point reward is multiplied by 1.9. Players call this a “1.9 thread.” For example, a base reward of 100 FP becomes 190 FP for the contributor.
- 80% Arc bonus = multiplier 1.8
- 90% Arc bonus = multiplier 1.9
- 100% Arc bonus = multiplier 2.0
The in-game reward is shown as a whole number, so calculators typically apply rounding logic. This page uses floor rounding for boosted rewards to match conservative planning.
How to Use This Calculator
Step 1: Enter Arc Bonus
Set your current Arc bonus in percent. You can use preset buttons for common values like 80, 90, or 100.
Step 2: Enter Base Rewards
Add the base FP rewards for positions 1 to 5 from the target Great Building level. These values come from the GB contribution window.
Step 3: Calculate
Click the button and the tool returns:
- Base reward by position
- Boosted reward with your Arc bonus
- Thread contribution suggestion (equal to boosted FP in standard fair-rate threads)
Practical Tips for Better FOE Investing
- Keep Arc leveling steadily: reaching 80+ bonus unlocks much better returns.
- Use the same rounding rule across your guild: avoids confusion in threads.
- Double-check high-value snipes: one wrong number can erase profit.
- Track thread rates: some guilds use 1.85 or 1.9 depending on member progression.
Common Questions
Is this only for Arc owners?
No. Even if your Arc is low level, the calculator helps you understand expected returns and decide where to invest efficiently.
Can I use it for custom thread rates?
Yes. Set your exact Arc bonus or equivalent rate. For example, 85% Arc bonus behaves like a 1.85 multiplier.
Why are my in-game numbers sometimes different by 1 FP?
This usually comes from rounding differences or from looking at a different GB level than the one currently active.
Final Thoughts
A good foe arche rechner saves time, prevents mistakes, and improves your Forge Point efficiency every day. Whether you focus on guild support, self-leveling, or sniping, accurate reward math gives you a clear advantage.