Gross rating points combine audience reach percentage with average exposure frequency.
Gross Rating Points (GRP) Calculator
Form
Results
Reach percentage
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GRP
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Table of Contents
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What is GRP Calculator?
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How to Use This Calculator
- Enter or select Total audience, Audience reached, Frequency per viewer.
- Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
- Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
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Formula Used
GRP = reach percentage × average frequency
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Variables Explained
| Input | What it means |
|---|---|
| Total audience | Use the measured or stated value for this item, with the unit or category shown beside the field. |
| Audience reached | Use the measured or stated value for this item, with the unit or category shown beside the field. |
| Frequency per viewer | How often the event, payment or administration occurs; use the form’s stated schedule. |
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Worked Example
Reaching 30% of an audience 4 times gives 120 GRPs.
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Why Use This Calculator?
Compare the result with the underlying statement, budget or proposed transaction. It is most useful when every amount uses the same reporting period and the same accounting definition.
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Common Mistakes
- GRPs can exceed 100 because people may see an ad repeatedly; reach itself cannot exceed the audience.
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Frequently Asked Questions
Should I use monthly or annual figures?
Use one consistent period for every amount and rate in the relationship. If a form specifies an annual rate or a monthly amount, follow that label rather than mixing time periods.
Does the result include fees and tax?
Only the costs and taxes represented by the inputs and formula are included. A real transaction can include other charges, so compare the estimate with the underlying agreement or statement.
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Sources & References
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