GRP (Gross Rating Point)

A gross rating point, or GRP, is one percent of the target population exposed to an ad, summed across every airing in a schedule. GRPs count exposures rather than people, so the same total can mean many people reached once or fewer people reached several times, which is why GRPs are read together with reach and frequency.

GRP Formula:

GRP = Reach × Frequency

Where:

Reach is a percentage of your target audience exposed to your ad at least once

Frequency is an Average number of times each person sees your ad

How To Calculate Gross Rating Points

For example, reaching 40% of households with an average frequency of 3 exposures generates 120 GRPs. The formula treats all exposures equally, whether they're concentrated on fewer viewers or spread across more households.

GRP Calculator: