Enter the mean square between groups and the mean square within groups into the calculator to determine the f ratio.

## F Ratio Formula

The following formula is used to calculate an F ratio.

F = MBG / MWG

- where f is the f ratio
- MBG is the mean square between groups
- MWG is the mean square within groups

## F Ratio Definition

An f ratio is defined as the ratio between the mean square between groups and the mean square within the group.

## F Ratio Example

How to calculate f ratio?

**First, determine the mean square between groups.**Calculate the mean square between groups.

**Next, determine the mean square within groups.**Calculate the mean square within groups.

**Finally, calculate the f ratio.**Calculate the f ratio using the formula above.

## FAQ

**What is an F ratio?**

An F ratio is a measure of variance between means of groups. Just as the formula above states it’s a ratio of the mean square between groups divided by a mean square within groups. The larger the difference the higher the ratio and the higher the variance.