Our The Forge calculator is an all-in-one tool, designed to help you out when forging a weapon or a piece of armor in The Forge.
The calculator is built for both beginners, who use it to enhance their knowledge of the forging system, and for experienced players seeking optimal builds and trait setups.
Note: The calculator above attempts to mimic the process of forging weapons and armor from The Forge in its entirety, assuming a 100% quality (Masterwork) forge result, while providing insight into stats not available to players before forging an item. Base weapon stats were sourced from the in-game index, and they might be slightly inaccurate. The base stats for armors were manually extracted by forging all available armors using Cobalt Ore (1x multiplier), since these values are not available in the index.
Instead of manually calculating ore combinations, multipliers, and probability outcomes, use the calculator above to process your inputs in real-time and see the potential forging results, including:
Forging in The Forge involves combining up to four different ore types in varying quantities to create weapons or armor. The system uses layered probability calculations to determine both the item category you will forge and the specific variant within that category.
When placing ores into the forge, the game calculates the probability distribution across all available weapon or armor categories based on the total amount of ore in the forge mix. For example, with 12 ores total, you have approximately a 72% chance to forge a Katana, 22% for a Great Sword, and smaller probabilities for other weapon types.
Note: When forging an item both in-game and in the calculator, the item category and variation you get are random. So, even though you are most likely to craft a Katana with 12 ores in the forge mix (72%), this result is not guaranteed, and you might instead get a Straight Sword, which has a 3% forge chance.
Once the item category is determined (e.g., "Katana"), a second probability roll selects the specific variant (e.g., Uchigatana or Tachi). Each variant has its own drop rate, expressed as a fraction such as "1/1" for common variants or "1/16" for rare ones. The calculator normalizes these fractions into percentage probabilities for easier understanding.
Tip: Hover over the item type in the forge result preview to change the variant to a specific one you are looking to craft. This allows you to preview stats and drop rates of rare item variants such as the Chaos Straight Sword without having to forge them.
Each ore has a multiplier value (shown as "2.0x", "3.5x", etc.). Your forged item's stats depend on the average multiplier of all ores used:
Average Multiplier = (Sum of all ore multipliers) ÷ (Total ore count)
This average then scales the ATK/DEF and value stats of your forged item. Higher multiplier ores significantly increase damage, defense, and value when they make up a substantial portion of the mix. For example, a weapon forged primarily with Eye Ore (4.0× multiplier) will deal 20x more damage than one made with common Stone (0.2× multiplier), even if both result in the same weapon type.
Note: The name and material of a forged item are based on the ore that is most present in the forge mix. In cases where you have multiple ores in the mix in the same amount, the name and look of an item will be based on the ore with the highest multiplier. For example, if you forge an item using 9 Mithril (3.5x), 9 Uranium (3.0x), and 9 Eye Ore (4.0x), the main ore will be Eye Ore.
The values of items are affected by three multipliers in total: ore, rarity, and rare ore one. The latter two multipliers are the reason why rarer weapon and armor variations are more expensive, especially when forged using Legendary ores, for example. The complete value formula is this:
Value = Base Value × Ore Multiplier × Rarity Multiplier × Rare Ore Multiplier
Rarity multiplier applies to the base value of an item variant, and it is higher the lower the forge chance of an item variant within its item category is. One thing to note is that weapons and armor have separate scaling. The scaling goes as follows for weapons:
| Forge Chance | Rarity Multiplier |
|---|---|
| 1/1 | 1.0x |
| 1/2 | 1.05x |
| 1/4 | 1.1x |
| 1/8 | 1.15x |
| 1/16 | 1.2x |
And for armor variants:
| Armor Type | Rarity Multiplier |
|---|---|
| Samurai (Medium) | 1.1x |
| Viking (Medium) | 1.2x |
| Dark Knight (Heavy) | 1.2x |
| Wolf (Heavy) | 1.3x |
Rare ore multiplier is a fixed 1.25x increase to the value of an item. It is applied to all items forged with at least one Legendary or rarer ore from the Forgotten Kingdom area, or any of the ores from the Frostspire Expanse.
For example, the calculation for the value of a Wolf Chestplate (Heavy armor) forged using only Etherealite looks like this:
1,355 (Base) × 11.1 (Ore Multi) × 1.3 (Rarity Multi) × 1.25 (Rare Ore Multi) = 24,441 $
Certain ores apply special traits that provide bonus effects to forged items. Traits activate under specific conditions:
For example, if Fireite constitutes 20% of your weapon forge, its fire damage trait will be approximately halfway between its minimum and maximum possible values.
Tip: You can use search filters in the Ore List to filter ores based on whether they apply traits to weapons or armor, making it easier to plan your forge combinations.
Different areas in The Forge may have variations in ore availability, multipliers, and trait behaviors. The calculator accounts for these area-specific differences to provide accurate predictions based on where you're forging. Make sure to select the correct area when using the calculator to get the most precise results.
