Unofficial Roblox fan tool
The Forge Calculator
Build a forge mix before spending ore. Total ore count shows the likely weapon or armor range, while the weighted average estimates stats and material shares show trait thresholds.
Use at least 3 ores. Add up to 4 ore types in one forge mix.
Understand your mix
Compare the likely item range, average multiplier, and each ore's share before you forge.
Average multiplier
Each ore contributes its multiplier times quantity. The total is divided by all selected ores.
Likely item range
Total ore count selects a likely item range. Exact output remains RNG-based, especially between optimal counts.
Trait thresholds
Each ore has its own 10% and 30% share thresholds. Different ores with the same trait stay separate.
The Forge calculator FAQ
Quick answers before you spend your ores.
How many ores can I use in The Forge?
A craft needs at least 3 total ores, and a mix can contain up to 4 different ore types. This planner caps inventory suggestions at 51 total ores for weapons and 45 for armor.
Does The Forge calculator predict the exact item?
No. Total ore count identifies a likely weapon or armor range, but the exact item remains RNG-based.
How is the ore multiplier calculated?
The planner multiplies each ore's multiplier by its quantity, adds those contributions, and divides by the total ore count.
Planner pages
Plan a specific craft or look up an ore.
Weapon Calculator
Open the calculator in weapon mode and compare dagger, sword, axe, and colossal ore-count ranges.
Plan weaponsArmor Calculator
Compare armor ranges, main materials, and trait thresholds.
Plan armorInventory Optimizer
Choose a weapon or armor target count, then compare a high-average mix, a low-cost mix, and a focused stack.
Open optimizerOre Multipliers
Scan the ore table by rarity, area, multiplier, traits, and source notes.
View oresFormulas & sources
See the formulas, source dates, and limits behind your results.
View formulas & sources