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Free P-Value Calculator
Calculate p-values for t-tests, z-tests, chi-square, and F-tests.
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CalculateQuick Answer
P-value is probability of results this extreme if null hypothesis true. P < 0.05 typically considered significant.
Key Facts about P-Value Calculator:
- P < 0.05 = statistically significant
- Lower p = stronger evidence
- P is NOT probability hypothesis is true
- Two-tailed = 2× one-tailed
- Alpha (α) is significance threshold
Why Use Our P-Value Calculator?
P-value tools:
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Multiple Tests
t, z, χ², F tests.
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One/Two Tailed
Both options.
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From Test Stat
Enter statistic.
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Interpretation
Understand result.
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Instant
Quick results.
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How to P-Value Calculator in 3 Easy Steps
Calculate p-value:
1
Enter Statistic
Test statistic.
2
Select Test
Type of test.
3
Get P-Value
See significance.
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Significance
Statistical p-values
Frequently Asked Questions
Everything you need to know about our p-value calculator
What is p-value?
Probability of results if null hypothesis true.
Probability of getting results this extreme if null hypothesis is true.
Still have questions? Try the tool yourself!
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