This guide covers how ore multipliers actually stack (not what you think). If you're stuck at this stage of the game, the strategies below have been tested by top players and work reliably.
In This Guide
- The Common Misconception
- The Actual Stacking Formula
- What This Means for Recipes
- When Stacking Still Works
- Testing With the Calculator
The Common Misconception
Most players assume multipliers stack additively. They don't. Roblox The Forge uses a modified geometric-weighted formula where each additional ore contributes progressively less.
The Actual Stacking Formula
First ore contributes 100% of its rolled multiplier. Second ore contributes 80%. Third ore contributes 75%. So a 5x ore in the third slot only adds 3.75x effective boost — anchor your recipe with the highest-multiplier ore first.
What This Means for Recipes
You get more damage from swapping mid-tier ores for higher-tier ones than from just adding more ores. Quality > quantity for damage output.
When Stacking Still Works
Trait activation is binary: is the carrier ore in your recipe or not? So even a low-multiplier ore like Emerald (2.3x) can be worth including for its Regeneration trait. The optimal recipe balances multiplier with trait diversity.
Testing With the Calculator
The forge calculator on the homepage uses this exact stacking formula. Try picking 3 ores and swapping the order — you'll see the diminishing returns in action.
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Test the Strategies
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