Arc 1.9 Calculator

Optimize your Great Building leveling strategy by calculating costs, securing spots, and determining owner contributions.

Reward Spot Forge Points (Base Reward)

Total Owner’s Cost to Level

P1 Secure Cost

0 FP

P1 Investor Profit

0 FP

Total Investor FP

0 FP

Position	1.9 Rate Cost	FP to Secure Spot	Investor Profit	Owner FP Needed

This table breaks down the costs and Forge Points required for each reward spot using the arc 1.9 calculator method.

What is an Arc 1.9 Calculator?

An **arc 1.9 calculator** is an essential tool for players of the popular online strategy game, Forge of Empires. It revolves around a specific Great Building (GB), “The Arc.” The Arc provides a bonus to the rewards (Forge Points, Medals, Blueprints) a player receives when they contribute to another player’s Great Buildings. At level 80, The Arc gives a 90% bonus, leading to a total return of 190%, or a 1.9 multiplier, on the base reward. The term “1.9” has become the standard for a highly efficient, community-driven system for leveling Great Buildings. This calculator automates the complex math required to manage this system effectively.

This tool is indispensable for any player actively participating in “1.9 threads,” whether they are the owner of the Great Building being leveled or an investor contributing Forge Points (FP). The primary goal of the arc 1.9 calculator is to determine the exact number of FPs the GB owner must contribute to “secure” or “lock” each reward spot, ensuring that an investor who pays the 1.9 rate cannot be overtaken (“sniped”) by another player. For serious players, using an arc 1.9 calculator is not just a convenience; it’s fundamental to rapid and cost-effective GB advancement.

The Arc 1.9 Formula and Mathematical Explanation

The core logic of the arc 1.9 calculator is based on securing reward positions. The two key calculations are for the investor’s cost and the owner’s required contribution to lock a spot.

1. Investor’s Cost: This is the simplest part. An investor pays 1.9 times the base Forge Point reward for a given spot.
   
   Formula: Investor Cost = Base Reward × 1.9
2. Securing a Spot (Locking): This is the most critical calculation the arc 1.9 calculator performs. To prevent a spot from being sniped, the owner must ensure that the remaining Forge Points needed to level the GB are less than what a second player would need to add to pass the current top contributor. The simplified “locking” formula calculates how many FPs must be on the building *before* an investor adds their share. The amount needed to lock position `P(n)` is the total cost of the level, minus the 1.9 cost for the *next* position down, `P(n+1)`. The remaining amount is how many FPs the investor for `P(n)` will add.
   
   Formula: FP to Secure P(n) = Total Cost – (Investor Cost for P(n)) – (Investor Cost for P(n+1))

Variable	Meaning	Unit	Typical Range
Total Cost	Total Forge Points to complete the GB level.	FP	100 – 10,000+
Current FP	Forge Points already on the building.	FP	0 – Total Cost
Base Reward	The default FP reward for a specific position (P1-P5).	FP	5 – 2,000+
Investor Cost	The amount an investor pays (Base Reward * 1.9).	FP	Calculated
Owner Cost	The net FP the owner must personally contribute.	FP	Calculated

Key variables used in the arc 1.9 calculator.

Practical Examples (Real-World Use Cases)

Example 1: Leveling a High-Level Observatory

A player wants to level their Observatory from 60 to 61. The total cost is 1,736 FP. The base rewards are P1: 815 FP, P2: 260 FP, P3: 80 FP. Using an arc 1.9 calculator:

• P1 Investor Cost: 815 * 1.9 = 1549 FP.
• P2 Investor Cost: 260 * 1.9 = 494 FP.
• FP to Secure P1: The owner must ensure that after P1’s contribution, P2 cannot be sniped. The amount needed on the building to “lock” P1 is calculated relative to P2’s contribution. The calculator determines the owner needs to add 493 FP. After P1 pays their 1549 FP, the building levels. The owner’s cost is much lower than paying the full 1736 FP themselves. The arc 1.9 calculator shows the owner’s net cost is only 187 FP (1736 total – 1549 from P1).

Example 2: A Mid-Level Statue of Zeus

A player is leveling their Statue of Zeus from 30 to 31. Total Cost: 720 FP. Rewards are P1: 175 FP, P2: 55 FP. They use the arc 1.9 calculator to find their contribution.

• P1 Investor Cost: 175 * 1.9 = 333 FP.
• P2 Investor Cost: 55 * 1.9 = 105 FP.
• The calculator shows that the owner must contribute 282 FP to secure P1. Then, the P1 investor adds their 333 FP, and a P2 investor adds 105 FP. The total collected is 333 + 105 + 282 = 720 FP. The owner’s cost is just 282 FP, a significant saving. This highlights the power of using an arc 1.9 calculator for efficient leveling.

How to Use This Arc 1.9 Calculator

Using this calculator is straightforward and designed for quick, accurate results.

1. Enter Total Forge Points: Input the total FP cost for the Great Building’s next level.
2. Enter Current Forge Points: Add any FPs already on the building from other players (not your own priming FPs).
3. Input Base Rewards: Fill in the base FP rewards for positions 1 through 5. You can find this information in the game.
4. Read the Results: The calculator instantly updates. The “Total Owner’s Cost” shows your net contribution. The table details the cost for investors for each spot, how many FPs you must add to secure that spot, and the investor’s profit.
5. Follow the Plan: Add the “Owner FP Needed” for P1 to your building, then announce the spot is available for the “1.9 Rate Cost” in your 1.9 thread. Repeat for subsequent spots as they are taken.

Key Factors That Affect Arc 1.9 Calculator Results

Several factors can influence the outcomes and strategy around using an arc 1.9 calculator.

• Arc Level: The entire system is based on the investor’s Arc bonus. The 1.9 rate assumes a Level 80 Arc (90% bonus). If investors have higher-level Arcs (e.g., 1.92 rate), the math changes, and their costs will be slightly higher, reducing the owner’s cost.
• Great Building Level: Higher GB levels have exponentially higher FP costs and rewards. This makes using an arc 1.9 calculator even more critical, as the savings for the owner become immense.
• Competition (Sniping): In unsecured spots, a “sniper” can contribute just enough to take a reward spot for a profit, leaving the original investor with nothing. The primary purpose of the arc 1.9 calculator is to provide the numbers needed to prevent this.
• Forge Point Bank: Both owners and investors need a healthy bank of Forge Points. Owners need enough to prime spots, and investors need enough to take valuable spots when they become available.
• Guild vs. Public Threads: Guild-based 1.9 threads are generally safer and more organized. Public threads can be faster but carry a higher risk of sniping or misunderstandings.
• Blueprint Availability: Leveling a GB requires blueprints. The 1.9 system is one of the best ways to acquire blueprints by taking reward spots on many different GBs. An efficient arc 1.9 calculator strategy accelerates this process.

Frequently Asked Questions (FAQ)

1. Why is 1.9 the standard rate?

It became the standard because getting an Arc to level 80 (which provides the 90% bonus for a 1.9 total return) is achievable for dedicated players and offers a “break-even” point for investors. Higher levels have diminishing returns on investment, making Level 80 a popular and stable goal.

2. What does “locking” or “securing” a spot mean?

It means the owner has contributed enough of their own Forge Points to a Great Building so that even if an investor pays the full 1.9 rate for a spot, no other player can contribute more to steal that reward position. This is the core function of the arc 1.9 calculator.

3. Can I use this calculator for rates other than 1.9?

While this tool is named an arc 1.9 calculator, the underlying mathematical principles for securing spots can be adapted. However, the automated calculations here are specifically calibrated for the 1.9 rate.

4. What is “sniping”?

Sniping is the act of contributing to someone’s GB to claim a reward spot for fewer FPs than the reward itself is worth. The 1.9 system is essentially a form of organized, friendly sniping where the owner facilitates the process for a reduced leveling cost.

5. Is the owner’s cost always positive?

Not always. For some very high-level Great Buildings with massive rewards, the total contributions from investors at the 1.9 rate can exceed the total cost of the level. In these rare “sweet spot” levels, the owner’s cost can be zero or even negative (meaning they profit).

6. What happens if I input the wrong numbers in the arc 1.9 calculator?

Incorrect inputs will lead to incorrect security calculations. This could mean you either overpay as the owner or, more critically, under-contribute, leaving your investors vulnerable to being sniped. Always double-check the total cost and reward values from the game.

7. Does the calculator account for already contributed FPs?

Yes, the “Current Forge Points on Building” field is there for this exact reason. The arc 1.9 calculator will subtract these FPs from the amount still needed, adjusting the owner’s required contribution accordingly.

8. How does the investor make a profit if they pay 1.9x the reward?

An investor with a level 80 Arc (90% bonus) breaks even on Forge Points. Their “profit” comes from the other rewards: a large number of Medals and, most importantly, Blueprints for the GB they invested in, which are crucial for their own progress.