This t distribution calculator is a very-very handy tool that gives you results in a fraction of seconds. This really helpful calculator makes it easy to compute cumulative probabilities, based on t statistics. You can also compute t statistics based on cumulative probabilities.  

A standard probability value should be between 0 to 1, where 0 is the probability of sure non-occurrence and 1 is sure occurrence. It is highly used in market research and research methodologies by both individuals and agencies like Nielson. 

You can use this calculator to calculate the Student’s t-value based on the significance level and its corresponding degrees of freedom in the standard deviation (mean, median, mode values). 

This calculator will tell the users, in this case the Students, the t-value for a given probability and degrees of freedom. Student t-values for both one-tailed (that is right-tail) and two-tailed probabilities will be returned. 

The way you to use the calculator is as under:

1. Begin with entering the degrees of freedom (df).

2. Now, enter the significance level alpha (α is a number between 0 & 1).3. Hit the “Calculate” button to calculate the Student’s t-critical value.