p
P-Value Calculator
Convert test statistic (z, t, χ², F) to a one- or two-tailed p-value. Reverse direction supported (p-value to critical value).
MATHConvert test statistic (z, t, χ², F) to a one- or two-tailed p-value. Reverse direction supported (p-value to critical value).
Detailed instructions, formula notes, and US-context guidance shown in the calculator above.
Disclaimer: Estimate only. Consult a qualified professional for decisions with major financial, legal, or health consequences.
P-Value Calculator
Convert a test statistic (z or t) to a one- or two-tailed p-value under the standard normal / Student's t distribution.
Two-Tailed P-Value
4.9996e-2
Significance at α = 0.05Reject H₀
Frequently Asked Questions
What is the P-Value Calculator for?
Convert test statistic (z, t, χ², F) to a one- or two-tailed p-value. Reverse direction supported (p-value to critical value).
How do I use the P-Value Calculator?
Detailed instructions, formula notes, and US-context guidance shown in the calculator above.
How accurate are my p-value results?
Estimate only. Consult a qualified professional for decisions with major financial, legal, or health consequences.
Is the P-Value Calculator free to use?
Yes - every calculator on WhichCalc is completely free with no signup, no usage limits, and no tracking on the calculation itself. Results display instantly in your browser and your inputs are never sent to a server. Bookmark the page if you use this calculator regularly.