確率ジェネ

Confused about probabilities? “Probability Calc” quickly computes gacha and lottery odds using statistical models. Simple, fast, and ideal for game design and study.

"Probability Calc" is a tool that calculates chances in lotteries, gacha pulls, and draws using statistical models. Main features • Hypergeometric distribution: chance of drawing hits • Cumulative binomial distribution: chance of k hits in n trials • Simple input with instant results Recommended uses • Estimate gacha pulls needed • Pack-opening hit simulation • Campaign win-rate check • Game design and learning Privacy No login needed. All data stays on your device. Ads are minimal.