๐ Statistics
Chi-Square Calculator
The chi-square statistic measures how far observed frequencies deviate from what you expected. A small value means the data fits the expectation; a large one suggests something real is going on.
How it works
Observed values (comma separated)
Expected values (comma separated)
Chi-square statistic
Degrees of freedom
Total observed
Total expected
Largest single contribution
Frequently asked questions
How do I use the Chi-Square Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.