The Forge Calculator - Forging Simulator & Strategy
Compare ore combinations to find the highest expected value forging strategy across different worlds.
Select Ores
Click ore card to remove 1. Click "x" button to remove all.
Predicted Forging outcome
Composition & Traits
Add ores above to see composition and trait rolls.
Forge Chances
Forge Smarter With the Inventory You Have. Go to Inventory Optimizer to find the best possible combination of ores.
Note: The Forge Calculator provides estimates based on known mechanics. Actual results may vary due to RNG. See how it works.
What is The Forge Calculator?
A calculator for the Roblox game - The Forge
The Forge game mechanics are deep, relying on complex algorithms involving ore weight, rarity averages, and hidden probability tables. Guesswork is expensive. Wasting hard-earned Essence and high-tier ores on a poorly planned craft can set your progress back by hours. This is where The Forge Calculator becomes your most valuable asset.
The Forge Calculator designed to bridge the gap between RNG (Random Number Generation) and strategy. By analyzing the underlying mechanics of the game, this Forge Calculator empowers players to visualize their results before they ever approach the anvil. It helps players plan forges by simulating ore composition, traits, estimated damage, and armor health, and suggesting efficient crafts based on their inventory.
In a game where every ore counts, The Forge Calculator serves as your strategic advisor. It eliminates the blind gambling aspect of crafting, replacing it with data-driven decision-making.
How Does The Forge Calculator Work?
Bridge the gap between RNG and strategy
What The Forge Calculator Actually Calculates
Probability & Outcome Prediction
The Forge Calculator does probability and outcome prediction rather than random guesses. It takes your selected ores and runs them through the same kind of probability tables and mechanics used in The Forge crafting system to estimate outcomes for weapons and armor.
Data-Informed Decisions
It uses forge probability tables derived from the game’s mechanics to compute the likelihood of each possible result. The Forge Calculator shows percentage chances for different item types, highlights trait activation and strength, and visualizes expected damage, stats, and odds—helping you plan before you spend valuable resources.
What the Key Variables Mean in The Forge Calculator
World
Different worlds (e.g., World 1, World 2, World 3) in The Forge have different probability distributions and ore pools, so the same ore mix can give different chances depending on the world you’re forging in.
Ores
Each ore has a multiplier value (affecting base stats) and a rarity/trait profile. The Forge Calculator uses the combination of ores you select—up to four different types—to determine how these factors influence the likely outcome.
Traits
Traits are special attributes that become active when an ore constitutes at least 10% of your total ore mix. The strength of that trait scales with the percentage up to around 30%. For example, if a particular ore that boosts fire damage makes up 20% of your mix, its associated trait will contribute proportionally more effect than if it were only 10%.
Data Sources and Updates
Where the Probability & Stat Data Comes From
The Forge Calculator’s probability tables and multiplier values are based on game mechanics extracted from The Forge itself, often combined with community-verified testing. Multiplier values, trait activation rules, and outcome distributions are modeled to match how The Forge handles ore composition, probabilities, and stat outputs in real gameplay.
Keeping It Accurate
The Forge Calculator is designed to reflect the current state of the game based on the latest known tables. Although results are precise for the given model, actual in-game outcomes still involve randomness, so the calculator represents predicted expectations, not guarantees.
How to Use The Forge Calculator
Intuitive design for seamless gameplay integration
Step 1: Select Ores & Mode
Begin by selecting your current stock of ores into the dashboard. Choose the mode either "Weapon" or "Armor". The Forge Calculator interface allows you to select from all currently available ores in the game, from basic Stone and Copper to rare endgame materials.
Step 2: Preview Results
The Forge Calculator runs thousands of micro-simulations automatically based on your inputs. Within seconds, it generates a report detailed: Success Probability, Multiplier, Estimated damage/defense, DPS, Variants, Composition & Traits, and Forge Chances.
Step 3: Change Input and Re-run
You can change the input and rerun the forge calculator as many times as you need. Find a way that can maximize your multiplier and forge chance.
Step 4: Optimization
If the results aren't what you hoped for, use the "Forge Optimizer" feature. The Forge Calculator engine will suggest adding or removing specific ores to push the stats into a higher tier.
The Forge Calculator FAQs
Common inquiries about The Forge & The Forge Calculator
Is the Forge Calculator officially affiliated with Roblox?
No. The Forge Calculator is a fan-made tool developed by passionate players of The Forge. It is not officially endorsed by Roblox Corporation or the game developers. It is a utility created to help the community understand game mechanics better.
How accurate is The Forge Calculator?
The Forge Calculator is highly accurate regarding weight classes and tier averages. However, please remember that The Forge utilizes RNG (Random Number Generation). While our tool can predict probabilities (e.g., "80% chance of a Great Sword"), it cannot guarantee the outcome of a single craft. The tool is best used to understand long-term averages and optimization.
Why does The Forge Calculator suggest a different weapon than what I got?
This usually happens due to the "Weight" mechanic. If your ore combination places you right on the borderline between two weapon types (e.g., between a Katana and a Great Sword), the game flips a coin based on probability. The Forge Calculator will show you this percentage split (e.g., "50% Katana / 50% Great Sword") so you are aware of the risk.
Can The Forge Calculator predict Mythic Race rerolls?
While the primary focus is on smithing, we are working on a section for The Forge Calculator that simulates race rerolls based on known drop rates (e.g., the 0.5% chance for Demon or Angel). Currently, the tool focuses on the weapon and armor crafting systems.
Will The Forge Calculator be updated with new ores?
Yes. We are committed to keeping The Forge Calculator up-to-date with the latest game updates. If a new update drops, we aim to update The Forge Calculator Roblox database within 24 hours to reflect new materials.
What is the 'Dilution Rule' and why are my stats low?
Mixing high-tier ores (like Mythril) with low-tier 'filler' ores (like Stone) averages out the multiplier, drastically lowering your final gear's stats. It is often better to use fewer, high-quality ores than to dilute your pool with weak materials. The Forge calculator visualizes this average to help you avoid weak crafts.
Why do I die instantly when I spawn?
You likely have too many 'Glass Cannon' traits stacked (commonly from Eye Ores). If your total Max HP reduction reaches -100%, you will have 0 health and die immediately. Check the 'Traits' section in The Forge Calculator to ensure your build is viable.
Does the order of ores in the cauldron matter?
No. The Forge mechanics calculate the total weight and composition percentage. Placing a Legendary ore at the bottom or top of the stack does not change the outcome; only the quantity and type of ores matter.
What is the fastest way to level up Smithing?
Currently, crafting high-weight items like Colossal Swords (using 30+ ores) yields the most XP. The more materials you process in a single forge, the higher the experience gain.
How do Ore Traits work?
Certain ores (e.g., Fireite, Demonite) carry hidden traits like Burn or Explosion. These are not always visible in the in-game index. The Forge Calculator database includes these hidden values to show you exactly what passives you might roll.
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