Marketing · Free tool
Ad Frequency Calculator
Frequency is the average number of times each person in your audience saw the ad. Too low and the message does not register; too high and it wears out and wastes budget. This ad frequency calculator gives media buyers, marketers and founders the average for a named period in one step.
- OutputAverage frequency
- No sign-up
- Copy or print the result
- How it works ↓
Your entries stay in this browser. Use Fill example to see a finished page first.
What this marketing tool gives you
The result shows average frequency next to the period, impressions and audience size, so it can go straight into a campaign review or a note to the agency. You can come back later and your numbers will still be there, stored in the browser and not on a server.
What you enter
- Audience size: the number of people reached or targeted
- Impressions: total ad impressions served
- Period: the time span those impressions cover, as text (for example, 30 days)
Worked example
The example has an audience of 10,000 people and 30,000 impressions over 30 days. Average frequency = 30,000 ÷ 10,000 = 3, so each person saw the ad three times on average during those 30 days. The page labels this an average for the 30-day period, not an enforced cap.
How is ad frequency calculated?
Average frequency = impressions ÷ audience size, rounded to two decimals, over the period you name. The period is a label, not a number the tool computes with, but it is required so the result is never quoted without a time frame.
Audience size and impressions must be zero or more, and audience size cannot be zero, because there would be no divisor. The result is an average: some people may have seen the ad many more times, and it is not a cap that has been enforced on any platform.
Tips before you use the result
- Use reach (unique people who saw the ad) as audience size when you have it; using the full target audience understates frequency.
- Always compare frequencies over the same length of period. Three per week and three per month are very different.
- Watch the trend alongside click-through rate; rising frequency with falling CTR is the usual sign of ad fatigue.
- Set the platform's frequency cap after checking the average here, because the tool itself does not enforce one.
Frequently asked questions
What is a good ad frequency?
There is no single number; it depends on the channel, the creative and how familiar the audience already is with you. Many teams review creative once frequency climbs and engagement drops. This calculator gives the average for your period so you can compare it with your own benchmarks.
What is the difference between frequency and a frequency cap?
Frequency is what happened: the average impressions per person. A frequency cap is a rule set in the ad platform limiting how many times one person can see an ad in a period. This tool calculates the average; it does not set or check a cap.
Why do I need to enter a period?
Frequency is meaningless without a time frame. The tool requires a period, such as 7 days or a campaign flight, and shows it next to the result so the number is not later quoted out of context. The period text is not used in the arithmetic.
Should I use reach or audience size?
Reach, the number of unique people who actually saw the ad, gives the true average frequency. Using the full targetable audience gives a lower number because it counts people who never saw the ad. Use whichever you have, and label it the same way each time.
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Results depend on the figures you enter; check them against your own records before you rely on them. Last updated: October 2026 · Kurums editorial team.