P Value from Z score Calculator& Formulas

This tool is to calculate the left tailed, right tailed, two tailed probability values (p value) from the given z-score value.

Standard P Value from Z score Calculator

An online std. p value from z-score calculation and formulas.

Enter Z Score

     

Left / Right / Two Tailed Test

Left Tailed Test H1: parameter < value Notice the inequality points to the left Decision Rule: Reject H0 if t.s. < c.v.
Two Tailed Test H1: parameter not equal value Another way to write not equal is < or > Notice the inequality points to both sides.
Right Tailed Test H1: parameter > value Notice the inequality points to the right Decision Rule: Reject H0 if t.s. > c.v.

P Value from Z score Formula