Enter the number of positive results and the number of tests into the Positivity Rate Calculator. The calculator will evaluate the Positivity Rate.

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## Positivity Rate Formula

The following two example problems outline the steps and information needed to calculate the Positivity Rate.

**PO = P / T * 100**

- Where PO is the Positivity Rate (%)
- P is the number of positive results
- T is the number of tests

## How to Calculate Positivity Rate?

The following example problems outline how to calculate Positivity Rate.

Example Problem #1:

- First, determine the number of positive results.
- The number of positive results is given as: 30.

- Next, determine the number of tests.
- The number of tests is provided as: 60.

- Finally, calculate the Positivity Rate using the equation above:

PO = P / T * 100

The values provided above are inserted into the equation below and computed.

PO = 30 / 60 * 100 = 50.00 (%)

Example Problem #2:** **

For this problem, the variables required are provided below:

number of positive results = 50

number of tests = 60

Test your knowledge using the equation and check your answer with the calculator..

PO = P / T * 100** = ?**