Tools & Calculators

Three math-driven utilities built from the underlying game formulas. All client-side - no login, no tracking, no Robux.

EHP & Inferno Survival Calculator

Calculate Effective Hit Points across the Iron Soul buff cycle. Get a Safe / High Risk / One-Shot verdict before a Hell Mode or Castle attempt.

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Race Reroll Probability Calculator

Translate your reroll budget into a probability, a 90% confidence cost, and a pity threshold readout. Stop wondering if your next roll will be the one.

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Forge Optimizer & Material Calculator

Reverse-engineer a target weapon into expected forge attempts, a material deficit matrix, and a daily farming quota of Amber, Jade, and Crystal Shards.

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How these calculators work

Each tool is built directly from the formulas published in the Tools Design document. Inputs are local to your browser; nothing is sent to a server. The math is intentionally transparent - hover or read the formula below each input to understand the conversion.

When to use which

Use the EHP calculator before a Hell Mode or Castle attempt to validate your build against a specific boss's burst. Use the Race Reroll calculator before spending Robux. Use the Forge Optimizer to plan a multi-day material farming session around a target weapon.