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GRP stands for Gross Rating Point. A standard measure in advertising, it measures adverising impact. You calculate it as a percent of the target market reached multiplied by the exposure frequency.Thus, if you get advertise to 30% of the target market and give them 4 exposures, you would have 120 GRP.Now, just like most measures, you have to undestand the limitations of GRPs. standard measure in advertising, it measures adverising impact. You calculate it as a percent of the target market reached multiplied by the exposure frequency.
Instructions. Use the following formula to calculate your GRPs: Reach x Frequency = GRP. Reach is the number of individuals or homes who saw an ad at least once in your campaign schedule; frequency is the average number of times they saw it.Add up your total reach, and then insert your reach data into the equation.Each percentage is equal to one rating point. For instance 1 percent of viewers = 1 point.each is the number of individuals or homes who saw an ad at least once in your campaign schedule; frequency is the average number of times they saw it. Add up your total reach, and then insert your reach data into the equation. Each percentage is equal to one rating point. For instance 1 percent of viewers = 1 point.