Cramer's V calculator
Enter observed counts as contingency-table rows. Every row in use must contain the same number of columns.
How do I use this page?
- Enter counts for each row.
- Leave unused rows empty.
- Read V, corrected V and chi square.
What this page does not do: The measure has no direction. The chi-square approximation can be poor when expected cell counts are small.
Further reading
Theory — what does Cramer's V measure?
Cramer's V measures the strength of association between two categorical variables based on a contingency table. It ranges from 0 to 1 and is derived from the chi-square statistic together with the table's smaller dimension. The calculator requires entering observed counts as rows, and every row used must contain the same number of columns. A high value indicates a stronger association within that sample, but the coefficient has no sign — it measures strength, not direction, of a relationship.
Frequently asked questions
Can Cramer's V be negative?
Does V=1 prove causality?
See also
A/B test calculator
Compare two proportions in an A/B test. Calculate conversion rates, difference, uplift, z score, p value and c
A/B test planning — sample size, MDE and duration
Plan a two-proportion experiment, estimate detectable effect and traffic duration.
ACF and PACF autocorrelation calculator
Calculate ACF and PACF across time-series lags. Review the chart, reference bounds and coefficient table.