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Campaign Reach & Frequency Points Calculator

Estimate gross rating points from audience reach and exposure frequency.

  • Formula & worked example
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Edit a calculated value to solve backwards, or lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Use the result with context

Results are estimates for planning and education. Confirm rates, taxes, fees, and legal requirements with the relevant institution or a qualified professional before making a financial decision.

Formula and method

Reaching 200 of 1,000 people gives 20% reach. At an average of three exposures per reached person, the campaign delivers 60 gross rating points.

Reach (%) = audience reached ÷ total audience × 100; GRP = reach (%) × frequency

Worked example

Enter these known values and leave the other values blank.

Total audience
1000
Audience reached
200
Frequency per viewer
3
Reach percentage
20 %
GRP (gross rating point)
60 points

Assumptions and limitations

  • Yes. GRP includes repeated exposures, so it is not a unique-person percentage. Use an average frequency defined over the people reached.
  • Use consistent periods, currency and accounting definitions. The result follows the stated formula and the figures you supply.

Common questions

Can GRP exceed 100?

Yes. GRP includes repeated exposures, so it is not a unique-person percentage. Use an average frequency defined over the people reached.

References

The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.

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