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Gacha Probability CalculatorFun & Games

Gacha Probability Calculator

How likely is the banner character in your planned pulls? Flat-rate odds with hard pity, plus pull counts for 50–99% confidence.

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What Is the Gacha Probability Calculator?

The Gacha Probability Calculator turns a banner's drop rate, your planned pull count and the hard-pity cap into honest odds: the chance of at least one hit, the chance of walking away empty, expected hits, and how many pulls you'd need for 50%, 75%, 90% and 99% confidence. Presets match common banner formats.

How It Works

Enter the drop rate percentage, how many pulls you can afford, and the pity cap (toggle it off for games without one). Everything recalculates as you type.

When to Use It

Use it before spending saved currency on a limited banner — to decide whether your stash realistically reaches the character or whether you're relying on luck.

Frequently Asked Questions

Why Do My Real Odds Feel Better?
Many games add soft pity — sharply rising rates near the cap — which this flat model deliberately ignores. Treat these numbers as the floor of your odds.
Is This Gambling Advice?
No. It's math for planning entertainment spending — only spend what you're comfortable losing.

Found an issue? Send Feedback. See our data sources and update policy for tools that depend on changing information.