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Both calculators run independently — change the inputs on either side to compare results.

Odds Ratio Calculator

Compute the odds ratio from a 2×2 contingency table to measure the association between an exposure and an outcome. Widely used in epidemiology and case-control studies.

Exposed, with outcome (a)

Exposed, no outcome (b)

Unexposed, with outcome (c)

Unexposed, no outcome (d)

Statistics

Correlation Coefficient Calculator

Compute the Pearson correlation coefficient (r) between two variables from paired summary statistics — n, Σxy, Σx, Σy — to measure how strongly they move together linearly. The number ranges from −1 (perfect negative linear relationship) through 0 (no linear relationship) to +1 (perfect positive linear relationship).

Number of Pairs

Sum of XY

Sum of X

Sum of Y

Key differences

	Odds Ratio Calculator	Correlation Coefficient Calculator
Category	Statistics	Statistics
Inputs required	4	4
Result	Odds Ratio	Correlation Coefficient
What it does	Compute the odds ratio from a 2×2 contingency table to measure the association between an exposure and an outcome. Widely used in epidemiology and case-control studies.	Compute the Pearson correlation coefficient (r) between two variables from paired summary statistics — n, Σxy, Σx, Σy — to measure how strongly they move together linearly. The number ranges from −1 (perfect negative linear relationship) through 0 (no linear relationship) to +1 (perfect positive linear relationship).