Gross Rating Point = Indicator for the Comparability of Media Plans
The GRP (Gross Rating Point) represents the gross reach in percentage and is a term from media planning. It indicates the gross advertising pressure of a campaign. The Gross Rating Point makes it easier to compare alternative media plans.
The formula is:
GRP = Net reach in % multiplied by the average frequency of contact (average contact or OTS – Opportunity to See).
If an advertising campaign, for example, reaches 50% of your target group at least once and each person has four average contacts, the Gross Rating Point is 200. These 200 Gross Rating Points can be reached through many variations (e.g., 20% reach, 10 OTS = 200 GRP), which shows that the Gross Rating Point is just a relative advertising pressure, but does not provide any information about the quality of the media plan. Advertising overlaps are not considered in the Gross Rating Point.
Examples of reaching 200 GRP:
200 GRP = 100% reach with 1 average contact
200 GRP = 50% reach with 4 average contacts
200 GRP = 40% reach with 5 average contacts
The Importance of Gross Rating Points in Media Planning
The Gross Rating Point allows different media plans to be compared in terms of their advertising pressure. While the goal is generally to achieve as high a Gross Rating Point as possible, it is considered in relation to all other performance values. To develop a good media plan, both net reach and average contacts, alongside the Gross Rating Point, must be taken into account. The cost-effectiveness of a plan should also be considered when evaluating media plans. To calculate the cost of a Gross Rating Point, simply divide the total media costs by the number of Gross Rating Points to get the cost per Gross Rating Point.
Example of Gross Rating Points and Performance Values:
| Media costs per plan approx. 500k € | Plan 1 | Plan 2 | Plan 3 |
| Net reach | 70% | 50% | 68% |
| Average contacts | 10.5 | 15.1 | 12.8 |
| GRP | 735 | 755 | 870 |
| Cost per GRP | 680.27 € | 662.25 € | 574.71 € |
Plan 1 achieves the highest reach but also has the lowest advertising pressure and is the least cost-effective. Plan 3 has the highest GRP value, an acceptable reach, and is the most cost-effective.
Your Contact for Media Metrics
Dealing with media metrics requires extensive expertise. Media specialists like us have the necessary media experience and are happy to help you create alternative media plans and provide recommendations. If you need media planning, it is best to contact Heike Oeckinghaus
(oeckinghaus@trebbau.com, Tel.: 0221/37646 – 391).