Arc 1.9 Calculator – Optimize Your Forge of Empires Great Building Leveling

Welcome to the ultimate Arc 1.9 Calculator for Forge of Empires players! This tool helps you determine the fair Forge Point (FP) contributions for Great Building (GB) spots (P1-P5) using the popular 1.9 multiplier strategy. Whether you’re an owner looking to level up your GB efficiently or a contributor aiming to maximize your Arc bonus, our Arc 1.9 Calculator provides precise calculations to prevent sniping and ensure profitable trades.

Arc 1.9 Calculator

Base Rewards for Spots (FP)

Detailed Spot Contributions and Rewards

Spot	Base Reward (FP)	Fair Contribution (FP)	Contributor Profit (FP)
P1	0	0	0
P2	0	0	0
P3	0	0	0
P4	0	0	0
P5	0	0	0

What is an Arc 1.9 Calculator?

An Arc 1.9 Calculator is an essential tool for players of Forge of Empires (FoE) who want to efficiently level up their Great Buildings (GBs) or contribute to others’ GBs for profit. The “1.9” refers to a community-standard multiplier, typically associated with an Arc Great Building at level 80, which provides a 90% bonus (1.9x) to Forge Point (FP) rewards received from contributing to other players’ GBs.

This Arc 1.9 Calculator helps both GB owners and contributors. For owners, it determines the minimum FP they need to contribute to “lock” their GB level, preventing other players from “sniping” the top spots by overpaying. For contributors, it calculates the exact FP amount to invest in a spot to ensure they receive their base reward plus a profit, making the contribution self-sustaining or even lucrative.

Who Should Use the Arc 1.9 Calculator?

• Great Building Owners: To plan their GB leveling strategy, determine their “self-fund” amount, and ensure their GBs are leveled quickly and securely.
• Active Contributors: Players with a high-level Arc (especially Arc 80+) who regularly contribute to other players’ GBs to earn FPs, blueprints, and medals.
• Guild Leaders and Organizers: To facilitate fair trading within their guild and maintain a healthy GB leveling ecosystem.
• Newer Players: To understand the mechanics of GB contributions and prepare for future Arc ownership.

Common Misconceptions About the Arc 1.9 Calculator

• It’s a game mechanic: The 1.9 multiplier is a player-driven community standard, not an official game rule. While the Arc bonus is a game mechanic, the “1.9” strategy is a social agreement.
• It’s always 1.9: While 1.9 is common for Arc level 80, higher Arc levels (e.g., Arc 100, 120) offer higher multipliers (2.0, 2.1, etc.). This Arc 1.9 Calculator allows you to input your specific Arc bonus.
• It guarantees profit: While designed for profit, external factors like sniping or miscalculations can affect outcomes. It’s a tool for *fair* calculation, not a guarantee against all risks.
• It’s only for Arc owners: While Arc owners benefit most, the calculator helps *any* player understand the fair value of spots, even if they don’t have an Arc themselves.

Arc 1.9 Calculator Formula and Mathematical Explanation

The core of the Arc 1.9 Calculator lies in a simple yet powerful formula that balances the interests of both the GB owner and the contributor. The goal is to determine the “fair” contribution for a spot such that the contributor, leveraging their Arc bonus, receives their original reward back plus a profit, effectively making the contribution free or profitable for them.

Step-by-Step Derivation

Let’s break down the logic:

1. Contributor’s Goal: A contributor wants to put in a certain amount of Forge Points (let’s call it `C`) and receive a reward (`R`) such that their net FP change is positive or zero after their Arc bonus.
2. Arc Bonus Effect: With an Arc bonus multiplier (`M`), the contributor actually receives `R * M` FPs for a spot with base reward `R`.
3. Net FP Change: The contributor’s net FP change is `(R * M) – C`.
4. Fair Contribution (Break-even/Profit): For a “fair” contribution, the community standard aims for the contributor to effectively get their `C` FPs back from the bonus. This means the profit from the bonus should cover the contribution. The profit from the bonus is `R * M – R = R * (M – 1)`.
5. Equating Contribution to Profit: To make the contribution self-sustaining (or profitable), the contribution `C` should be equal to the profit generated by the Arc bonus. So, `C = R * (M – 1)`.
6. Solving for Contribution: Rearranging this, the fair contribution `C` is calculated as:

Fair Contribution (FP) = Base Reward (FP) / (Arc Bonus Multiplier – 1)

For example, if the Arc Bonus Multiplier is 1.9 (Arc 80) and a spot offers a 50 FP reward:

Fair Contribution = 50 FP / (1.9 – 1) = 50 FP / 0.9 ≈ 55.56 FP

The Arc 1.9 Calculator then rounds this up to the nearest whole FP (56 FP in this case) as FPs are typically whole numbers in game. The owner’s remaining FP is then calculated by subtracting the owner’s initial contribution and the sum of all fair contributions from the total FP needed for the level.

Variable Explanations and Table

Understanding the variables is key to using the Arc 1.9 Calculator effectively:

Key Variables for Arc 1.9 Calculations

Variable	Meaning	Unit	Typical Range
Total FP for Next Level	The total Forge Points required to complete the current level of the Great Building.	FP	100 – 100,000+
Owner's Current FP Contribution	Forge Points already invested by the GB owner into the current level.	FP	0 – 99,999+
Arc Bonus Multiplier	The bonus multiplier provided by the contributor’s Arc Great Building.	Multiplier	1.01 – 2.5 (e.g., 1.9 for Arc 80)
P1-P5 Reward (FP)	The base Forge Point reward for each of the top 5 contribution spots.	FP	0 – 1,000+
Fair Contribution (FP)	The calculated FP amount a contributor should place to profit from their Arc bonus.	FP	0 – 5,000+
Owner's Remaining FP to Secure	The FPs the owner needs to add to secure the GB level after all spots are filled.	FP	0 – 10,000+

Practical Examples Using the Arc 1.9 Calculator

Let’s walk through a couple of real-world scenarios in Forge of Empires to demonstrate how the Arc 1.9 Calculator works and how to interpret its results.

Example 1: Leveling a Zeus (Early Game GB)

A guild member wants to level their Zeus to level 5. The total FP needed for this level is 250 FP. The owner has already put in 50 FP. The rewards for the top 5 spots are:

• P1: 20 FP
• P2: 10 FP
• P3: 5 FP
• P4: 2 FP
• P5: 1 FP

Contributors in the guild typically use an Arc 80, so the Arc Bonus Multiplier is 1.9.

Inputs for the Arc 1.9 Calculator:

• Total FP for Next Level: 250
• Owner’s Current FP Contribution: 50
• Arc Bonus Multiplier: 1.9
• P1 Reward: 20
• P2 Reward: 10
• P3 Reward: 5
• P4 Reward: 2
• P5 Reward: 1

Outputs from the Arc 1.9 Calculator:

• P1 Fair Contribution: 20 / (1.9 – 1) = 20 / 0.9 ≈ 22.22 → 23 FP
• P2 Fair Contribution: 10 / (1.9 – 1) = 10 / 0.9 ≈ 11.11 → 12 FP
• P3 Fair Contribution: 5 / (1.9 – 1) = 5 / 0.9 ≈ 5.56 → 6 FP
• P4 Fair Contribution: 2 / (1.9 – 1) = 2 / 0.9 ≈ 2.22 → 3 FP
• P5 Fair Contribution: 1 / (1.9 – 1) = 1 / 0.9 ≈ 1.11 → 2 FP
• Total FP from All Spots: 23 + 12 + 6 + 3 + 2 = 46 FP
• Owner’s Remaining FP to Secure: 250 (Total) – 50 (Owner) – 46 (Spots) = 154 FP

Interpretation: The owner needs to put in 154 FP after all spots are filled to secure the level. Contributors can confidently take spots knowing they will profit. For example, a P1 contributor puts in 23 FP, gets 20 FP base reward, which becomes 20 * 1.9 = 38 FP with their Arc. Their profit is 38 – 23 = 15 FP.

Example 2: Leveling an Arc (High-Level GB)

A player is leveling their Arc from level 80 to 81. This requires a significant 12,000 FP. The owner has already contributed 2,000 FP. The rewards for this high-level Arc are:

• P1: 1000 FP
• P2: 500 FP
• P3: 250 FP
• P4: 125 FP
• P5: 60 FP

The guild uses a standard Arc Bonus Multiplier of 1.9 for contributions.

Inputs for the Arc 1.9 Calculator:

• Total FP for Next Level: 12000
• Owner’s Current FP Contribution: 2000
• Arc Bonus Multiplier: 1.9
• P1 Reward: 1000
• P2 Reward: 500
• P3 Reward: 250
• P4 Reward: 125
• P5 Reward: 60

Outputs from the Arc 1.9 Calculator:

• P1 Fair Contribution: 1000 / 0.9 ≈ 1111.11 → 1112 FP
• P2 Fair Contribution: 500 / 0.9 ≈ 555.56 → 556 FP
• P3 Fair Contribution: 250 / 0.9 ≈ 277.78 → 278 FP
• P4 Fair Contribution: 125 / 0.9 ≈ 138.89 → 139 FP
• P5 Fair Contribution: 60 / 0.9 ≈ 66.67 → 67 FP
• Total FP from All Spots: 1112 + 556 + 278 + 139 + 67 = 2152 FP
• Owner’s Remaining FP to Secure: 12000 (Total) – 2000 (Owner) – 2152 (Spots) = 7848 FP

Interpretation: The owner needs to contribute 7848 FP to secure the level after the top 5 spots are filled at 1.9 rates. This example highlights how the Arc 1.9 Calculator scales for larger GBs, providing critical information for high-level play and preventing costly mistakes.

How to Use This Arc 1.9 Calculator

Our Arc 1.9 Calculator is designed for ease of use, providing quick and accurate results for your Forge of Empires Great Building leveling needs. Follow these steps to get the most out of the tool:

Step-by-Step Instructions:

1. Enter Total FP for Next Level: Find this number in your Great Building’s information panel in FoE. It’s the total Forge Points required to reach the next level.
2. Enter Owner’s Current FP Contribution: Input the amount of Forge Points the GB owner has already invested in the current level. If the owner hasn’t put any FPs yet, enter ‘0’.
3. Enter Arc Bonus Multiplier: This is crucial. For an Arc level 80, this is typically 1.9. For higher Arc levels, consult an Arc bonus table (e.g., Arc level 100 gives 2.0, Arc level 120 gives 2.1). Ensure this value is greater than 1.
4. Enter P1-P5 Rewards (FP): These are the base Forge Point rewards for each of the top 5 contribution spots. You can find these in your GB’s information panel or by using external FoE databases.
5. Click “Calculate Arc 1.9”: The calculator will automatically update results as you type, but you can also click this button to manually trigger a calculation.
6. Click “Reset”: If you want to start over with default values, click the “Reset” button.

How to Read the Results:

• Owner’s Remaining FP to Secure (Primary Result): This is the most critical number for the GB owner. It tells you how many FPs you, as the owner, need to contribute to “lock” the GB level after all the top 5 spots have been filled at the calculated fair contributions. This prevents other players from “sniping” your spots.
• P1-P5 Fair Contribution: These are the recommended FP amounts for contributors to place in each spot. By contributing these amounts, players with the specified Arc Bonus Multiplier will receive their base reward plus a profit.
• Total FP from All Spots: The sum of all P1-P5 fair contributions.
• Detailed Spot Contributions Table: Provides a clear breakdown of each spot’s base reward, fair contribution, and the profit a contributor would make with the given Arc bonus.
• Visualizing Contributions Chart: A bar chart illustrating the fair contributions for each spot, offering a quick visual comparison.

Decision-Making Guidance:

• For GB Owners: Use the “Owner’s Remaining FP to Secure” to know when to stop promoting your GB for contributions and when to fill the remaining FPs yourself. This ensures you don’t overpay and that your GB levels efficiently.
• For Contributors: Use the “Fair Contribution” values to confidently take spots in other players’ GBs, knowing you will make a profit. Always double-check the owner’s current FP and the total FP needed to ensure the GB is being leveled using the Arc 1.9 strategy.
• Preventing Sniping: The Arc 1.9 Calculator is your best defense against sniping. By knowing the exact amount the owner needs to put in, you can ensure the GB is secured before opportunistic players can take spots for less than the fair 1.9 rate.

Key Factors That Affect Arc 1.9 Calculator Results

While the Arc 1.9 Calculator provides precise figures, several factors in Forge of Empires can influence the overall effectiveness and application of the 1.9 strategy. Understanding these elements is crucial for optimal GB leveling and contribution management.

1. Arc Level and Bonus Multiplier: The most direct factor. The higher your Arc’s level, the higher your bonus multiplier. While 1.9 is standard for Arc 80, an Arc 100 offers a 2.0 multiplier, and so on. Using the correct multiplier in the Arc 1.9 Calculator is paramount for accurate results.
2. Great Building Type and Level: Different GBs have varying FP costs per level and different base rewards for their contribution spots. A high-level Arc will have much larger FP requirements and rewards than an early-game Zeus. The Arc 1.9 Calculator needs accurate total FP and reward inputs specific to the GB and its current level.
3. Community and Guild Standards: The “1.9” is a community-driven standard. Some guilds might use slightly different multipliers (e.g., 1.85 or 2.0) based on their members’ average Arc levels or internal agreements. Always confirm the prevailing standard in your guild or community before using the Arc 1.9 Calculator.
4. Owner’s Initial Contribution: The amount of FP the GB owner has already put into their building directly impacts the “Owner’s Remaining FP to Secure” value. A higher initial contribution from the owner means less FP needed from contributors or a smaller “self-fund” amount for the owner at the end.
5. Blueprint and Medal Needs: While the Arc 1.9 Calculator focuses on FP efficiency, players often take spots not just for FP profit but also for specific blueprints or medals. This can sometimes lead to players taking spots even if the FP profit isn’t optimal, or if the GB isn’t being leveled strictly by 1.9 rules.
6. Sniping Risk: Sniping occurs when a player places FPs on a GB spot for less than the fair 1.9 rate, often to secure blueprints or medals, potentially costing the owner more FP to secure the level. The Arc 1.9 Calculator helps owners determine their “secure” amount to prevent this.
7. Forge Point Economy: The overall availability and value of Forge Points in your server or guild can influence how strictly 1.9 rules are followed. In FP-rich environments, players might be more lenient, while in tighter economies, precision from the Arc 1.9 Calculator becomes even more critical.
8. Event and Quest Requirements: Sometimes, players need to contribute FPs for events or quests. This can temporarily alter contribution patterns, as players might prioritize quest completion over strict 1.9 adherence.

Frequently Asked Questions (FAQ) about the Arc 1.9 Calculator

What exactly is the “1.9” in Arc 1.9 Calculator?

The “1.9” refers to a community-standard multiplier used in Forge of Empires for Great Building (GB) contributions. It’s derived from the bonus provided by an Arc Great Building at level 80, which gives a 90% bonus to Forge Point (FP) rewards. So, a base reward of 100 FP becomes 190 FP (100 * 1.9) for an Arc 80 owner. The Arc 1.9 Calculator uses this to determine fair contributions.

Why is it important to use an Arc 1.9 Calculator?

Using an Arc 1.9 Calculator is crucial for efficient GB leveling and profitable contributions. For GB owners, it helps determine the exact amount of FP they need to contribute to secure their GB level, preventing “sniping.” For contributors, it ensures they place the correct amount of FP to receive their base reward plus a profit, making their contributions self-sustaining or even lucrative.

What if my Arc is not level 80? Can I still use this Arc 1.9 Calculator?

Absolutely! While “1.9” is commonly associated with Arc level 80, this Arc 1.9 Calculator allows you to input your specific Arc Bonus Multiplier. Simply find your Arc’s bonus percentage (e.g., Arc level 100 gives 100% bonus, so the multiplier is 2.0) and enter it into the calculator for accurate results tailored to your Arc.

How do I find the base rewards for GB spots?

You can find the base rewards for each spot (P1-P5) by clicking on your Great Building in Forge of Empires and navigating to its information panel. Many FoE fan sites and wikis also provide comprehensive tables of GB levels and their corresponding rewards.

What is “sniping” and how does the Arc 1.9 Calculator help prevent it?

Sniping occurs when a player places FPs on a GB spot for less than the fair 1.9 rate, often to secure blueprints or medals, potentially costing the owner more FP to secure the level. The Arc 1.9 Calculator helps owners by calculating the “Owner’s Remaining FP to Secure.” By contributing this amount, the owner “locks” the GB, making it impossible for others to snipe the top spots.

Is the 1.9 strategy always the best way to level a GB?

The 1.9 strategy, facilitated by the Arc 1.9 Calculator, is widely considered the most efficient and fair method for leveling GBs in a guild environment. It promotes mutual benefit, allowing contributors to profit while helping owners level their buildings. However, in some niche situations (e.g., very early game, specific event requirements), other strategies might be temporarily employed.

What if a contributor doesn’t have an Arc?

A player without an Arc will not receive the bonus FPs. If they contribute at the 1.9 rate, they will lose FPs. The Arc 1.9 Calculator is primarily for Arc owners or for owners who want to set up their GBs for Arc owners. Players without an Arc should be cautious when contributing to 1.9 threads, or only take spots where the base reward is equal to or greater than their contribution.

Can I use this Arc 1.9 Calculator for any Great Building?

Yes, this Arc 1.9 Calculator can be used for any Great Building in Forge of Empires, regardless of its type or level. You just need to input the correct “Total FP for Next Level” and the “P1-P5 Rewards” specific to that GB and its current level.

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• Best Great Buildings in FoE

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• FoE Forge Points Guide

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