Forge of Empires 1.9 Calculator
The "1.9 system" in Forge of Empires is a popular method for efficiently leveling up Great Buildings (GBs) within a guild or community. It's based on the principle that contributors (other players) will pay 1.9 times the Forge Point (FP) reward they receive for placing FPs on a GB. This allows the GB owner to level their building without having to pay for all the spots themselves, while contributors gain blueprints and medals at a favorable rate.
This calculator helps you determine the exact amount of Forge Points needed for each spot under the 1.9 system, as well as the total FPs the GB owner needs to contribute to "lock" the building for the next level.
Enter the total Forge Points required to complete the current GB level.
The FP reward for the player taking the 1st spot.
The FP reward for the player taking the 2nd spot.
The FP reward for the player taking the 3rd spot.
The FP reward for the player taking the 4th spot.
The FP reward for the player taking the 5th spot.
Understanding the 1.9 System
The 1.9 system is a cornerstone of efficient Great Building progression in Forge of Empires. It's particularly beneficial for players with high-level Arcs, as the Arc's bonus increases the FP rewards for contributors, making the 1.9 ratio even more attractive.
- For the GB Owner: It allows you to level up your Great Buildings faster by leveraging contributions from other players. You only need to pay a portion of the total FPs, typically enough to "lock" the building (meaning the remaining FPs are covered by the 1.9 contributions).
- For Contributors: By paying 1.9 times the reward, contributors receive a guaranteed profit in blueprints and medals, which are essential for their own GB progression and city expansion. The 1.9 ratio is generally considered a fair exchange, especially when the contributor's Arc bonus is factored in.
How to Use This Calculator
- Total FPs for GB Level: Find this value in your Great Building's information panel for the next level.
- Spot Rewards: Also found in your Great Building's information panel, these are the base FP rewards for each of the top 5 spots.
- Calculate: Click the "Calculate 1.9 Values" button.
The calculator will then display the exact FPs each contributor should place for their respective spot, and most importantly, the total FPs you, as the GB owner, need to place to lock the building.
Example Scenario: Leveling an Arc from 80 to 81
Let's say you're leveling your Arc from level 80 to 81. The total FPs required for this level is 1990. The base FP rewards for the top 5 spots are:
- Spot 1: 400 FPs
- Spot 2: 200 FPs
- Spot 3: 50 FPs
- Spot 4: 10 FPs
- Spot 5: 5 FPs
Using the calculator with these values:
- Spot 1 Contributor Pays: 400 * 1.9 = 760 FPs
- Spot 2 Contributor Pays: 200 * 1.9 = 380 FPs
- Spot 3 Contributor Pays: 50 * 1.9 = 95 FPs
- Spot 4 Contributor Pays: 10 * 1.9 = 19 FPs
- Spot 5 Contributor Pays: 5 * 1.9 = 9.5 FPs
Total FPs from Contributors: 760 + 380 + 95 + 19 + 9.5 = 1263.5 FPs
Owner's Lock FPs: 1990 (Total Cost) – 1263.5 (Contributor FPs) = 726.5 FPs
This means you, as the owner, would place 726.5 FPs, and then the contributors would fill the spots according to the 1.9 rule, completing your GB level efficiently.
1.9 System Calculation Results:
"; resultHTML += "FPs for Spot 1 (1.9x): " + spot1Contribution.toFixed(2) + " FPs"; resultHTML += "FPs for Spot 2 (1.9x): " + spot2Contribution.toFixed(2) + " FPs"; resultHTML += "FPs for Spot 3 (1.9x): " + spot3Contribution.toFixed(2) + " FPs"; resultHTML += "FPs for Spot 4 (1.9x): " + spot4Contribution.toFixed(2) + " FPs"; resultHTML += "FPs for Spot 5 (1.9x): " + spot5Contribution.toFixed(2) + " FPs"; resultHTML += ""; resultHTML += "Total FPs from Contributors (1.9x): " + totalContributorFPs.toFixed(2) + " FPs"; if (ownerLockFPs < 0) { resultHTML += "Owner's Lock FPs: 0 FPs (The sum of 1.9 contributions exceeds the total GB cost. This usually means the rewards entered are too high for the GB level cost, or the owner has already placed FPs.)"; } else { resultHTML += "Owner's Lock FPs: " + ownerLockFPs.toFixed(2) + " FPs"; } document.getElementById("result").innerHTML = resultHTML; }