The 1.9 Thread Calculator exists because doing this math manually is error-prone and slow. Enter your inputs, get the answer, move on with your build.
1.9 threading is the standard FoE guild trading practice. It only works if the math checks out: the FP you contribute must return more via Arc-multiplied rewards. This calculator handles the exact break-even calculation for any GB level and any Arc bonus.
Try the 1.9 Thread Calculator Now
The full interactive tool is available on the main calculator page.
Open FoE Calculator →How the 1.9 Thread Calculator Works
The calculation model uses the standard FoE game math: base GB rewards scale with level according to the published curves, Arc bonuses multiply rewards by (1 + Arc%/100), and position-specific payouts follow the tiered P1-P5 distribution. Every number the calculator returns matches what you'd calculate manually — it just does it in milliseconds.
Common Questions
Is the 1.9 Thread Calculator accurate?
Yes — the underlying formulas are based on the game's published mechanics. If you notice any discrepancy with in-game values, please report it via the contact page.
Does the tool account for the Arc bonus?
Every calculation applies your specified Arc bonus. If you're unsure of your exact Arc bonus, check your Arc GB level and use the corresponding percentage from the standard Arc reward table.
Do I need an account?
No. The tool works entirely in your browser with no login, no signup, no data collection beyond anonymous analytics.
Related FoE Tools
Use the 1.9 Thread Calculator
Use the free calculator to test your build against the exact game math.
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