Statistics

Relative Risk Odds Ratio Calculator

Compute RR, OR, and confidence intervals from a 2x2 contingency table.

Relative Risk Odds Ratio Calculator derives RR and OR from 2x2 outcome tables. It is useful in epidemiology, A/B analysis, and risk comparison studies. The tool converts contingency counts into interpretable effect measures. Use it to compare exposure and outcome relationships.

2x2 Table Inputs

a=exposed+outcome, b=exposed+no outcome, c=unexposed+outcome, d=unexposed+no outcome

Result

Risk exposed: 0.450000

Risk unexposed: 0.200000

Relative risk: 2.25000000

RR 95% CI: 1.437687 to 3.521281

Odds ratio: 3.27272727

OR 95% CI: 1.745242 to 6.137109

How to use this tool

Enter counts for exposed/unexposed and outcome/no-outcome cells.
Run the tool to compute RR and OR values.
Interpret effect size with confidence intervals where available.

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