Reach and frequency calculator
Impressions from reach and frequency, or frequency from impressions and reach. Optional budget for a reach-based cost. Runs in your browser; nothing you type is sent anywhere.
Formula
Impressions equal reach multiplied by average frequency, so frequency equals impressions divided by reach and reach equals impressions divided by frequency. 1,000,000 impressions reaching 250,000 people is a frequency of 4. GRPs equal reach percentage multiplied by frequency: 25 percent reach at a frequency of 4 is 100 GRPs.
Reach requires recognizing the same person across exposures, which platforms do within their own walls and estimate across them. Cross-platform reach is deduplicated with a panel or identity graph or it is overstated.
Typical ranges are on the benchmarks pages; definitions in the glossary.