FoE Calculator - Forge of Empires Great Building & Arc Calculator
Welcome to the most comprehensive FoE calculator for Forge of Empires players. This powerful FoE calculator helps you calculate Great Building (GB) investments, Arc bonus rewards, secure spots efficiently, and maximize your forge point (FP) returns. Whether you're leveling your own GBs, sniping reward positions, or managing 1.9 threads, this calculator provides accurate calculations to optimize your gameplay strategy and resource management in Forge of Empires.
Great Building Investment Calculator
Understanding the FoE Calculator
The FoE calculator is an essential tool for Forge of Empires players who want to optimize their Great Building investments and maximize forge point returns. This calculator helps you determine exactly how many FP to invest in any Great Building to secure reward positions, calculate Arc bonus multipliers, and analyze owner costs versus patron rewards. Whether you're participating in 1.9 threads, sniping GBs, or leveling your own buildings, this FoE calculator provides the mathematical precision needed for strategic gameplay and efficient resource management in Forge of Empires.
FoE Calculator Formulas
The fundamental calculation in any FoE calculator determines how Arc bonus affects reward positions. The Arc Great Building provides a percentage boost to all rewards, with higher levels offering greater bonuses. A 90% Arc bonus (1.9 thread) means you receive the base reward plus 90% extra, effectively 1.9 times the original amount. This formula is crucial for understanding potential returns before investing forge points.
How to Use This FoE Calculator
This comprehensive FoE calculator offers three specialized calculation modes designed to address different aspects of Great Building management in Forge of Empires. Each mode provides precise calculations to help you make informed investment decisions, maximize returns, and participate effectively in guild swap threads.
Mode 1: GB Investment Calculator
Enter the total FP required to level a Great Building along with the base rewards for all five positions. Select your Arc bonus percentage, and the FoE calculator automatically computes the boosted rewards for each position, the total FP needed to secure each spot, and the owner's net cost after patron contributions. This mode is perfect for GB owners posting their buildings to guild threads or planning their leveling strategy.
Mode 2: Arc Bonus Calculator
Input any base reward amount and your Arc bonus level to instantly see how much the reward increases with your Arc boost. This simple yet powerful FoE calculator helps you quickly evaluate whether reward positions are worth pursuing based on your specific Arc level and understand the true value of different reward spots across various Great Buildings.
Mode 3: Secure Spot Calculator
Specify the GB's total FP requirement, the base reward for your target position, any FP already invested by others, and your Arc bonus. The calculator determines exactly how many FP you need to invest to secure that position safely, your total reward, net profit, and return on investment percentage. This mode is essential for sniping GBs and evaluating investment opportunities.
Arc Bonus Levels and Percentages
The Arc (Atomium) is the most valuable Great Building in Forge of Empires because it boosts all GB rewards. Understanding Arc bonus percentages at different levels is crucial for using any FoE calculator effectively and participating in thread exchanges.
| Arc Level Range | Bonus Percentage | Multiplier | Thread Name |
|---|---|---|---|
| Level 1-9 | 70-78% | 1.70-1.78x | Below standard threads |
| Level 10-13 | 80% | 1.80x | 1.8 Thread |
| Level 14-24 | 81-85% | 1.81-1.85x | 1.85 Thread |
| Level 25-39 | 86-90% | 1.86-1.90x | 1.9 Thread (Most common) |
| Level 40-54 | 91-92% | 1.91-1.92x | 1.92 Thread |
| Level 55-69 | 93-94% | 1.93-1.94x | 1.94 Thread |
| Level 70-79 | 95% | 1.95x | 1.95 Thread |
| Level 80+ | 100%+ | 2.00x+ | 2.0+ Thread (Advanced) |
Thread Terminology: In Forge of Empires, a "thread" refers to organized guild exchanges where players help each other level Great Buildings. The 1.9 thread is the most popular, requiring participants to have at least a level 25 Arc (90% bonus). This ensures all participants receive nearly double their base rewards, making investments profitable and sustainable for long-term GB leveling strategies.
Practical FoE Calculator Examples
Scenario: A guild member posts an Arc leveling from level 40 to 41. Total FP needed: 1,000. Position 1 reward: 200 FP base. You have a 90% Arc bonus.
Calculation:
Scenario: You find a GB with 50 FP already in position 3 (base reward 100 FP). Total cost 800 FP. Your Arc: 92%.
Calculation:
Scenario: You're leveling your Cape Canaveral from level 5 to 6. Total cost: 510 FP. Rewards: P1=114, P2=57, P3=19, P4=10, P5=0. All positions filled at 1.9 thread.
Calculation:
Benefits of Using an FoE Calculator
Strategic Great Building management separates successful Forge of Empires players from casual participants. Using a dedicated FoE calculator provides numerous advantages that directly impact your progression speed, forge point efficiency, and overall game enjoyment.
- Maximize ROI: Calculate exact returns before investing to ensure every FP generates profit rather than losses
- Avoid Costly Mistakes: Prevent investing too much or too little in reward positions, protecting your forge point reserves
- Secure Positions Safely: Determine precise investment amounts that guarantee your spot won't be sniped by other players
- Optimize Thread Participation: Understand exactly how much to invest in 1.9, 1.92, or other thread exchanges for maximum benefit
- Owner Cost Planning: GB owners can accurately predict their net leveling costs after patron contributions
- Quick Sniping Decisions: Evaluate available GB opportunities instantly to identify profitable snipes before others claim them
- Arc Level Impact: See how upgrading your Arc affects potential profits across all reward positions
- Strategic Planning: Make informed decisions about which GBs to invest in based on mathematical analysis rather than guesswork
- Guild Coordination: Share accurate calculations with guild members to facilitate smooth thread operations
- Resource Efficiency: Minimize wasted FP on unprofitable investments, channeling resources toward optimal opportunities
Understanding Great Building Mechanics
To use the FoE calculator effectively, you must understand how Great Buildings work in Forge of Empires. Each GB has multiple levels, with each level requiring increasingly large forge point investments. The top five contributors to any level-up receive rewards, which are significantly boosted by The Arc. Players can contribute to their own GBs or others' buildings. The reward system encourages cooperation through guild threads, where players help each other level buildings efficiently while profiting from Arc-boosted rewards that exceed their investments.
Common Thread Types and Strategies
Different threads operate under various Arc bonus requirements and reward structures. The FoE calculator adapts to all thread types to help you participate effectively regardless of your guild's specific rules.
1.9 Thread (90% Arc)
The most popular thread type requires level 25+ Arc. Rewards are 90% boosted, providing excellent returns for both GB owners and patrons. Most calculations in this FoE calculator default to 90% because this thread dominates guild coordination across all Forge of Empires servers. New players should prioritize reaching Arc level 25 to access these highly profitable exchanges.
1.92 and 1.94 Threads
Advanced threads for players with higher Arc levels (40+ and 55+). These provide even better returns but require more selective membership since fewer players have achieved these Arc levels. Use the FoE calculator to compare profits between thread types and determine when upgrading your Arc becomes worthwhile for accessing premium threads.
1.8 and 1.85 Threads
Entry-level threads for players still leveling their Arc (level 10-24). While less profitable than 1.9 threads, they provide important training grounds for learning thread mechanics and building forge point reserves. The FoE calculator helps newer players maximize returns even with lower Arc bonuses until they can graduate to more advanced threads.
Advanced FoE Calculator Strategies
Experienced players use the FoE calculator for sophisticated strategies beyond basic thread participation. These advanced techniques require mathematical precision that only a dedicated calculator can provide reliably.
Double Dipping
When two GBs level simultaneously, strategic players use the FoE calculator to secure profitable positions in both buildings with the same forge points, effectively doubling returns. This requires careful timing and precise calculation of investment amounts to ensure both positions remain secure through leveling.
Spot Swapping
Players with multiple accounts or close guild coordination can swap reward positions, with each account securing spots in the other's GBs. The FoE calculator ensures both parties invest fair amounts that generate mutual profits, maintaining equity in long-term swapping partnerships.
Overnight Leveling
Guild members coordinate timed leveling where GBs complete during off-hours, preventing external snipers from claiming positions. The FoE calculator helps plan exact investment timing so the building reaches completion at the designated moment without premature leveling or failed coordination.
Common FoE Calculator Mistakes
Even with a calculator, players make errors that cost forge points. Avoid these common mistakes to maximize your Forge of Empires efficiency and protect your hard-earned resources.
Common Errors:
- Wrong Arc Bonus: Using 90% when you only have an 80% Arc costs significant profit. Always verify your actual Arc level before using the FoE calculator.
- Ignoring Current Investments: Failing to account for FP already in a position leads to over-investment. Always check existing contributions before calculating secure amounts.
- Rounding Errors: Investing 1-2 FP less than the calculated secure amount risks being sniped. Add a 1-2 FP safety buffer to calculator results.
- External Patron Confusion: When external (non-Arc) patrons occupy spots, reward calculations become complex. Use advanced FoE calculator modes or consult guild leaders.
- Leveling Too Fast: Adding FP without coordinating causes premature leveling, potentially cutting out planned patrons. Follow thread protocols strictly.
FoE Calculator for Guild Management
Guild leaders and thread organizers rely heavily on FoE calculators to manage swap threads efficiently. Creating thread posts requires calculating secure amounts for all positions across multiple Arc bonus levels to accommodate different member capabilities. The calculator ensures fair participation rules, prevents disputes over investment amounts, and maintains thread sustainability by guaranteeing all participants profit from their contributions. Many successful guilds maintain standardized calculator links or spreadsheets derived from FoE calculator formulas to streamline thread operations and onboard new members quickly.
When to Use Manual vs Automated FoE Calculators
Various FoE calculator options exist, from simple web calculators like this one to sophisticated browser extensions that automatically extract GB data. Manual calculators (like this FoE calculator) offer flexibility and educational value, helping you understand the mathematics behind Great Building investments. Browser extensions provide speed and convenience for active thread participants processing multiple GBs daily. Most experienced players use both: manual calculators for planning and learning, automated extensions for rapid thread participation and sniping opportunities that require split-second calculations.
Recommendation: Start with manual FoE calculators to learn the formulas and mechanics thoroughly. Once comfortable with GB mathematics, consider browser extensions like FoE Helper for improved efficiency. Understanding the underlying calculations ensures you can verify automated results and catch errors that might otherwise cost forge points. The best players combine calculator knowledge with practical thread experience to optimize their Forge of Empires progression.
FoE Calculator Etiquette and Fair Play
Using a FoE calculator is not cheating—it's essential mathematical analysis available to all players. However, thread communities expect certain standards of conduct. Always respect posted positions and locks, even if the FoE calculator shows the owner made calculation errors. Never snipe guild members' GBs unless explicitly allowed by your guild's rules. Share calculator knowledge with newer players to strengthen your entire guild's capabilities. Verify your calculations before committing FP, as mistakes waste everyone's time and resources. Following these principles maintains healthy thread communities and ensures long-term access to profitable Great Building exchanges.
Important Disclaimer: This FoE calculator is an unofficial tool created by Forge of Empires players for player benefit. It is not affiliated with, endorsed by, or officially connected to InnoGames GmbH or the Forge of Empires game. All calculations are based on publicly available game mechanics and formulas. Users are responsible for verifying calculator results before making in-game investments. While we strive for accuracy, forge point investments are made at your own risk. Game mechanics may change with updates, potentially affecting calculation accuracy. Always double-check critical investments and follow your guild's specific thread rules and requirements. Forge of Empires and all related trademarks are property of InnoGames GmbH.