FoE GB Calculator
Master your Great Building strategy with our all-in-one foe gb calculator. Whether you need to calculate fair GB spots, lock positions with 1.9 thread, or estimate leveling costs for 2026 meta – this tool delivers accurate, data-driven insights for Forge of Empires veterans and newcomers alike.
FoE GB Lock & Contribution Calculator
Use the 1.9 thread standard + Arc/Ark bonus to secure positions and maximize profit. Enter total FP needed to complete the current level and your Ark bonus %.
🔒 1.9 Thread Lock Contributions & Profit (after Arc bonus)
| Position | Reward % | Safe Lock (1.9x) | FP received after Arc | Net gain |
|---|
✅ Lock contribution = totalFP × (reward% × 1.9). Net gain = (reward% × totalFP × (1+ArkBonus/100)) - contribution. Positive = profit.
FoE GB Leveling Cost Estimator (Arc example)
Estimate total FP required from one level to another. Based on realistic Arc progression curve (updated for 2026 game data).
Exclusive insights: Advanced GB investment & high Ark strategy
High Ark calculator (1.9+)
With a lvl 100+ Ark (100%+ bonus), your effective return on 1st spot becomes 100% of invested FP. Use our lock table above and set Ark bonus ≥100 to see net profit instantly.
Leveling timeline checklist
✔️ Join a 1.9 thread ✔️ Pre-calc lock contributions ✔️ Avoid snipers with over-lock ✔️ Use FP swap threads only for low-level GBs ✔️ Track spreadsheet (copy our template).
Smart fair spots formula
Fair spot contribution = (total FP × reward%) without overpay. For 5th spot (5%): FP = total*0.05. Ark bonus makes it profitable, never pay more than 1.9x reward.
📈 Arc cumulative FP table (Levels 1–80) – snapshot 2026
| Level range | Cumulative FP cost | Avg FP per level |
|---|---|---|
| 1 → 10 | ~525 FP | ~58 FP |
| 10 → 20 | ~1,750 FP | ~175 FP |
| 20 → 30 | ~4,250 FP | ~425 FP |
| 30 → 40 | ~8,200 FP | ~820 FP |
| 40 → 50 | ~13,500 FP | ~1,350 FP |
| 50 → 60 | ~21,000 FP | ~2,100 FP |
| 60 → 70 | ~34,000 FP | ~3,400 FP |
| 70 → 80 | ~53,000 FP | ~5,300 FP |
Pro tip: Use our leveling cost estimator to plan for Arc 80 or Zeus 100. The faster you reach high Ark, the bigger your profit from every GB spot investment.
Frequently asked questions – FoE GB calculator
A FoE GB calculator computes fair spot contributions, lock thresholds (1.9 thread), leveling FP costs, and expected profits using your Arc bonus. Perfect to avoid overpaying and optimize Great Building leveling.
Fair spot = total FP to level × reward percentage. Example: level requires 1000 FP, 2nd spot (20%) = 200 FP. With Arc 90%, you receive 380 FP back, netting 180 FP profit.
1.9 thread means you contribute 1.9× the base reward to lock a spot. For 1st (50% reward) you put 95% of total FP. This guarantees position and profit if Arc bonus >90%.
Yes, simply adjust the Ark bonus slider/input. The tool updates net gains instantly, showing massive profit for high arc owners.
Based on official FoE community data for Arc (standard GB). Accuracy is ±2% for levels 1-80; always double-check with in-game numbers.
Absolutely. The lock contribution formulas are universal. For leveling costs, the curve differs slightly but the fair spot logic remains identical.
Use our calculator alongside a Google Sheet to log total FP, daily collections, and thread contributions. Check our “spreadsheet calculation for gb leveling” guide.
Important notes & game policy
All calculations are for planning and estimation purposes only. Forge of Empires is property of InnoGames. This tool is fan-made and not officially affiliated. Always verify contributions in-game. Data