Ad Reach Calculator
Reviewed by Hamza Gujjar, Algorithm Architect & Software Developer
Last updated: July 27, 2026Splitting impressions into reach and frequency
The same total impression volume can mean very different things - many people seeing an ad once, or fewer people seeing it several times - reach and frequency together describe which scenario actually happened.
Worked example
For 500,000 total impressions at an average frequency of 4:
Reach = 500000 / 4 = 125,000.0 unique people reached
Media planners deliberately choose reach versus frequency emphasis based on campaign goals - broad awareness campaigns typically favor higher reach at lower frequency, while direct response campaigns often favor higher frequency to reinforce a message with a smaller, more targeted audience.