Gacha Calculator – Optimize Your Pulls with Real Math

Pulling in gacha games isn’t just luck—it’s probability, and probability can be calculated. Gacha Calculator helps you take the guesswork out of banners, drop rates, and pity systems so you can make smarter decisions with your in-game currency. Whether you're estimating how many pulls you’ll need or simulating your odds at a specific count, this gacha probability calculator gives you real numbers you can act on.

Supports Soft Pity, Hard Pity, and Rate-Up Guarantees

From Genshin Impact to Honkai: Star Rail and more, this gacha pull calculator supports custom configs and includes presets for major titles. Set your base drop rate, soft pity and hard pity thresholds, and whether a rate-up guarantee applies. Whether you're saving for a limited character or budgeting for an upcoming banner, you’ll know exactly how far your wishes, gems, or tickets are likely to go.

Behind the Gacha Odds: Real Probability, Real Results

Behind the scenes, the calculator uses cumulative probability, binomial distributions, and soft pity modeling to simulate your odds. But you don’t need to understand the math to use it—you just need to know what you want. Choose your mode, enter a few values, and let the tool handle the rest. For full probability model info, see the Technical Details page.

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Plan Smarter Gacha Pulls and Maximize Results

Whether you're chasing a rate-up unit, calculating your chances at hard pity, or just trying to stretch your pulls, Gacha Calculator gives you a practical edge. No more guessing, no more superstition—just a clean, fast, and accurate tool to help you pull smarter and win more.

Want to go deeper? Check out some of our Insights into gacha mechanics and pull optimization.