Weighted multiplier
Your final multiplier is the ore-weighted average: Σ(count × multiplier) ÷ total ores. Twenty Frost Stars and thirty trait ores beats fifty mediocre stones — but the trait waterlines matter more.
The Forge Calculator
Load up to 4 ores, watch the multiplier, trait waterlines and RNG-lock odds update in real time. Every number below runs on the same math the game uses — weighted multiplier, class-roll curves and true speed tables.
Anvil world
Class roll follows the gaussian weight curve.
100%
Dwarf race adds +5 Forgeborn bonus (hard cap 100).
Crucible
Fill up to 4 slots · 1–99 ores each · min. 3 ores totalSnap every trait ore to its 30% sweet spot and fill the rest with your best multiplier ore.
Rune sockets
0x0 DPS0 ores
How the forge math works
The 10% / 30% trait sweet spot
A trait ore activates at 10% of the crucible and reaches full power at 30%. Past 30% it still contributes multiplier but the trait is overcapped — pour the excess into your best filler instead.
RNG lock & class curves
Each weapon class rolls on a gaussian curve over ore count. Feed the lock threshold (50 ores for Colossal Swords) with RNG Lock on and the class roll becomes guaranteed — only the variant roll remains.
Quality & runes
Forge quality scales final stats linearly: 100% quality doubles the base. Runes add expected-value procs — Blast Chip averages out to a flat DPS share at max roll.
Frequently asked questions
What is the best ore recipe for Colossal Gemblade in The Forge? ＋
The community BiS recipe is 15 Kitsunite + 15 Bizzarite + 20 Frost Star at World 4: 27.00x multiplier, both traits at the 30% sweet spot, and a guaranteed Colossal Sword class roll at exactly 50 ores.
How does the 30% trait sweet spot work? ＋
Every trait ore counts its share of the total crucible. Below 10% the trait is inactive; between 10% and 30% it scales linearly; at exactly 30% it reaches maximum power; above 30% it wastes ores that could go to a higher-multiplier filler.
What does RNG Lock actually do? ＋
With RNG Lock enabled, feeding the crucible at least the class lock count (e.g. 50 ores for Colossal Swords) guarantees the class roll. You still roll the variant inside that class, so a 1-in-5 Colossal Gemblade is the realistic ceiling.
Is The Forge Calculator free to use? ＋
Yes — the simulator, reverse solver, inventory optimizer and every wiki page are free, with no account and no download. The math runs entirely in your browser.