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In present study, a calculator, probDistriCal, was developed for probability distributions. In the calculator, the probability distributions as normal distribution, t distribution, F distribution, chi-square distribution, exponential distribution, power law distribution, Weibull distribution, Zhang distribution, binomial distribution, Poission distribution, and negative binomial distribution, etc., were available for use. Given a random value, the corresponding probability for a known probability distribution can be calculated. The calculator is web browser based that includes both online and offline versions and can be used on various computing devices (PCs, iPads, smartphones, etc.), operating systems (Windows, Mac, Android, Harmony, etc.) and web browsers (Chrome, Firefox, etc).