Free · Math · Statistics & Probability

P-value Calculator

Convert a z statistic to left-tailed, right-tailed, and two-tailed normal-distribution p-values.

  • Checked formula
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Calculator inputs

Enter your values

Result

Your calculation

Two-tailed p-value
0.04999565
Left-tailed p-value
0.97500217
Right-tailed p-value
0.02499783

These p-values use the standard normal distribution.

How to use this calculator

  1. Enter the known values using the units shown.
  2. Choose the calculation you want when more than one method is available.
  3. Calculate, then review the result and the worked formula together.

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Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.