Enter the reach percentage and the average frequency into the calculator to determine the gross rating points (GRP).

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## GRP Formula

The following formula is used to calculate the gross rating points.

GRP = R * AF

- Where GRP is gross rating points
- R is the reach percentage (percentage of people that are reached by a program)
- AF is the average frequency per viewer reached (for example a viewer watching 5 episodes each with one ad would have a frequency of 5*1 = 5.

To calculate gross rating points, multiply the reach percentage by the average frequency per viewer reached.

## GRP Definition

**What is GRP? **

GRP, short for gross rating points, is a metric used in standard television or radio advertising to measure the impact of any particular campaign using a specific medium or schedule.

## Example Problem

**How to calculate GRP? **

First, determine the reach percentage of the medium. For this example, there is a popular television show that reaches 15% of the adult population in the country of analysis.

Next, determine the average frequency a person sees the advertisement. For this show, there are 5 ads played through the episode. This leads to a frequency of 1 show watched * 5 ads per show = 5.

Finally, calculate the GRP using the formula above:

GRP = R% * AF

GRP = 15 * 5

GRP = 75 points