# Odds Ratio Calculator

Odds Ratio Calculator

Share via:

## What is Odds Ratio?

Odds Ratio is a measure used to compare the likelihood of an event occurring in one group to the likelihood of it occurring in another group. It is calculated by dividing the odds of the event occurring in one group by the odds of it occurring in the other group. Odds Ratio is used in medical research and epidemiology to measure the strength of an association between two variables.

## What is Odds Ratio Calculator?

An Odds Ratio Calculator is a tool used to calculate the odds ratio of an event or outcome. It is used to compare the likelihood of an event occurring in one group to the likelihood of it occurring in another group. The Odds Ratio Calculator can be used to assess the strength of an association between two variables.

## How to Calculate Odds Ratio?

The Odds Ratio (OR) is a measure of association between two binary variables. It is calculated by taking the ratio of the odds of one variable occurring in one group to the odds of the same variable occurring in the other group. To calculate the Odds Ratio, first calculate the odds of the variable occurring in each group. For example, if the variable is “having a disease”, then the odds of having the disease in the first group would be the number of people with the disease divided by the number of people without the disease. The odds of having the disease in the second group would be the number of people with the disease divided by the number of people without the disease in the second group. Once the odds of the variable occurring in each group have been calculated, the Odds Ratio is calculated by taking the ratio of the odds of the variable occurring in the first group to the odds of the variable occurring in the second group. For example, if the odds of having the disease in the first group are 2:1 and the odds of having the disease in the second group are 4:1, then the Odds Ratio would be 2:4 or 1:2.

Cite this content, page or calculator as:

Andy, Cohen “Odds Ratio Calculator” at

from FreeCalculator.net, https://www.freecalculator.net

#### Statistics Calculators

Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors

#### Popular categories

FreeCalculator.net’s sole focus is to provide fast, comprehensive, convenient, free online calculators in a plethora of areas. Currently, we have over 100 calculators to help you “do the math” quickly in areas such as finance, fitness, health, math, and others, and we are still developing more. Our goal is to become the one-stop, go-to site for people who need to make quick calculations. Additionally, we believe the internet should be a source of free information. Therefore, all of our tools and services are completely free, with no registration required.

We coded and developed each calculator individually and put each one through strict, comprehensive testing. However, please inform us if you notice even the slightest error – your input is extremely valuable to us. While most calculators on FreeCalculator.net are designed to be universally applicable for worldwide usage, some are for specific countries only.