When a gacha banner advertises a small percentage per pull, the real question is not the single pull odds but the chance you land your target at least once across all your pulls. That is where players trip up, because probabilities do not simply add. This calculator uses the correct formula: the chance of at least one success equals one minus the chance of failing every single time, or one minus (1 minus p) raised to the number of pulls. Enter the per pull rate and how many pulls you plan, and it returns your cumulative chance instantly, along with the expected number of successes and how many pulls it takes to cross a 50 percent and 90 percent chance. This helps you budget currency before you spend. Everything is computed locally in your browser with nothing sent anywhere, so you can plan any banner with honest numbers instead of gut feeling.
When a gacha banner advertises a small percentage per pull, the real question is not the single pull odds but the chance you land your target at least once across all your pulls. That is where players trip up, because probabilities do not simply add.
Yes. Gacha Pull Probability Calculator is completely free, with no sign-up and no usage limits.
Yes. Gacha Pull Probability Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Gacha Pull Probability Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.