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GRP Calculator

Calculate Gross Rating Points (GRP) from reach and frequency. Optional impressions estimate.

Use the GRP Calculator

Enter reach (%) and frequency. GRPs and optional impressions are calculated.

Inputs

Reach (% of target audience) and frequency (average exposures).

Results

GRPs
120

GRP = Reach (%) × Frequency. Reach is % of audience that saw the ad; frequency is average times they saw it. Impressions = Audience × Reach × Frequency when audience size is given.

What this metric means

GRPs combine reach and frequency into one number for planning and buying. They don't tell you unique reach by themselves—you need reach % and frequency to interpret.

How to calculate it

GRP = Reach (%) × Frequency. If you have total audience size, Impressions = Audience × (Reach/100) × Frequency.

How to improve the metric

Increase reach (broader or better-placed media), frequency (more spots or longer flight), or both. Budget and CPM constrain what's possible.

Common mistakes

Treating GRPs as unique reach; mixing reach definitions (e.g. target vs total population); or comparing GRPs across different audience definitions.

How to interpret your result

Use GRPs to compare weight of campaigns. Same GRPs can mean different reach/frequency trade-offs—check both to understand impact.

FAQs

What are GRPs?▾
GRP = Reach (%) × Frequency. Reach is the percentage of the target audience that saw the ad; frequency is how many times they saw it on average.
What's a good GRP level?▾
It depends on campaign goals and budget. Higher GRPs mean more reach and/or frequency. Compare to past campaigns and category norms.
How do I get reach and frequency?▾
From media or analytics: reach is % of audience exposed at least once; frequency is average exposures among those reached.
When do I use impressions?▾
Impressions = Audience size × Reach × Frequency when you have total audience. Use it to tie GRPs to actual impression counts.

Related tools

Browse all calculators on NetGrow.

NetGrow

GRP Calculator

Calculate Gross Rating Points (GRP) from reach and frequency. Optional impressions estimate.

Use the GRP Calculator

Enter reach (%) and frequency. GRPs and optional impressions are calculated.

Inputs

Reach (% of target audience) and frequency (average exposures).

Results

GRPs
120

GRP = Reach (%) × Frequency. Reach is % of audience that saw the ad; frequency is average times they saw it. Impressions = Audience × Reach × Frequency when audience size is given.

What this metric means

GRPs combine reach and frequency into one number for planning and buying. They don't tell you unique reach by themselves—you need reach % and frequency to interpret.

How to calculate it

GRP = Reach (%) × Frequency. If you have total audience size, Impressions = Audience × (Reach/100) × Frequency.

How to improve the metric

Increase reach (broader or better-placed media), frequency (more spots or longer flight), or both. Budget and CPM constrain what's possible.

Common mistakes

Treating GRPs as unique reach; mixing reach definitions (e.g. target vs total population); or comparing GRPs across different audience definitions.

How to interpret your result

Use GRPs to compare weight of campaigns. Same GRPs can mean different reach/frequency trade-offs—check both to understand impact.

FAQs

What are GRPs?▾
GRP = Reach (%) × Frequency. Reach is the percentage of the target audience that saw the ad; frequency is how many times they saw it on average.
What's a good GRP level?▾
It depends on campaign goals and budget. Higher GRPs mean more reach and/or frequency. Compare to past campaigns and category norms.
How do I get reach and frequency?▾
From media or analytics: reach is % of audience exposed at least once; frequency is average exposures among those reached.
When do I use impressions?▾
Impressions = Audience size × Reach × Frequency when you have total audience. Use it to tie GRPs to actual impression counts.

Related tools

Browse all calculators on NetGrow.