Enter the sum of all expected referrals and the number of observed referrals into the Standardized Referral Ratio Calculator. The calculator will evaluate the Standardized Referral Ratio.

## Standardized Referral Ratio Formula

The following two example problems outline the steps and information needed to calculate the Standardized Referral Ratio.

**SRR = EF / OR**

Variables:

- SRR is the Standardized Referral Ratio ( )
- EF is the sum of all expected referrals
- OR is the number of observed referrals

## How to Calculate Standardized Referral Ratio?

The following steps outline how to calculate the Standardized Referral Ratio.

- First, determine the sum of all expected referrals.
- Next, determine the number of observed referrals.
- Next, gather the formula from above = SRR = EF / OR.
- Finally, calculate the Standardized Referral Ratio.
- 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.

sum of all expected referrals = 400

number of observed referrals = 500

SRR = EF / OR** **= ?