MedCalcOne-way Chi-squared test
Use this one-way Chi-squared test to test the statistical significance of differences in a one-way classification system.
Required input
First, select the number of different categories.
Next, enter the number of cases for each category.
Interpretation
The results section contains the Chi-squared value, the Degrees of Freedom and associated P-value.
If the calculated P-value is small (<0.05), then there is a significant difference between the frequencies of the different categories.
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How to cite this page
- MedCalc Software Ltd. One-way Chi-squared calculator. https://www.medcalc.org/en/calc/chisquared-1way.php (Version 23.5.5; accessed May 14, 2026)
Other free statistical calculators
- Two-way Chi-squared test
- Other statistical tests calculators
- Sample size calculation
- Post-hoc power analysis
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