Enter the value of MB and the value of MD into the Certainty Factor Calculator. The calculator will evaluate the Certainty Factor.

## Certainty Factor Formula

The following two example problems outline the steps and information needed to calculate the Certainty Factor.

**CF = MB – MD / (1- min(MB,MD))**

Variables:

- CF is the Certainty Factor ( )
- MB is the value of MB
- MD is the value of MD

## How to Calculate Certainty Factor?

The following steps outline how to calculate the Certainty Factor.

- First, determine the value of MB.
- Next, determine the value of MD.
- Next, gather the formula from above = CF = MB – MD / (1- min(MB,MD)).
- Finally, calculate the Certainty Factor.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

value of MB = .999

value of MD = .997

CF = MB – MD / (1- min(MB,MD))** **= ?