Enter the number of false discoveries and the number of tests performed into the False Discovery Rate Calculator. The calculator will evaluate the False Discovery Rate.

## False Discovery Rate Formula

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

FDR = FD / T *100
• Where FDR is the False Discovery Rate (%)
• FD is the number of false discoveries
• T is the number of tests performed

To calculate the false discovery rate, divide the number of false discoveries by the number of tests performed.

## How to Calculate False Discovery Rate?

The following example problems outline how to calculate False Discovery Rate.

Example Problem #1:

1. First, determine the number of false discoveries.
• The number of false discoveries is given as: 40.
2. Next, determine the number of tests performed.
• The number of tests performed is provided as: 500.
3. Finally, calculate the False Discovery Rate using the equation above:

FDR = #FD / #T *100

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

FDR = 40 / 500 *100 = 8.00 (%)

Example Problem #2:

For this problem, the variables required are provided below:

number of false discoveries = 20

number of tests performed = 600