Ad frequency and fatigue estimator
Calculate average impressions per reached person and examine a cautious fatigue heuristic.
Last updated
Written by Madly editorial
01 / Your inputs
Run the numbers
Example figures are filled in so you can see a result straight away. Replace them with your own. Results update as you type; no data is sent or saved.
Total ad impressions in the reporting period.
Unique people reached; must be greater than zero.
Optional frequency of at least 1 from a comparable prior period, calculated with the same method.
02 / Calculation
Average frequency
Calculated result
2.5 impressions/person
Unit: impressions/person
Frequency is impressions divided by reach. Frequency alone does not establish ad fatigue or its cause.
Trend checklist: same audience and period length; frequency, link CTR, purchase CPA, conversion lag, tracking integrity and offer changes. This is not automatic fatigue detection.
Formula
Average frequency = impressions ÷ reach. If a previous period is entered, change = current frequency − previous frequency.
How to read this
If frequency rises while CTR or acquisition efficiency falls, consider reviewing creative and audience overlap. Other changes may explain the pattern; do not treat a frequency alone as proof of fatigue.
Assumptions
Reach is unique people within the measured period and scope; impressions can repeat. Any fatigue flag is only a heuristic about repeated exposure, not a diagnosis or platform threshold.
How to use this tool
- Enter impressions and reach for the same ads and date range.
- Read the average number of times each person saw the ad.
- Look at how frequency changes over time rather than a single figure.
- Check CTR and CPA alongside it before deciding to refresh creative.
Worked example
Illustrative example: 12,000 impressions across 4,000 people gives an average frequency of 3; some people may see more and others less.
What this measures
Frequency is an average across reached people. It cannot tell you how often each individual saw an ad or why results changed.
Formula and units
Average frequency = impressions ÷ reach. If a previous period is entered, change = current frequency − previous frequency.
Assumptions and review notes
Reach is unique people within the measured period and scope; impressions can repeat. Any fatigue flag is only a heuristic about repeated exposure, not a diagnosis or platform threshold.
If frequency rises while CTR or acquisition efficiency falls, consider reviewing creative and audience overlap. Other changes may explain the pattern; do not treat a frequency alone as proof of fatigue.
There is no frequency number that is always too high. Retargeting audiences tolerate far higher frequency than cold ones, and some products need repeated exposure before purchase. Watch the trend. Rising frequency with falling CTR and rising CPA is a stronger signal than any single number.
- Audience size.
- Budget relative to audience.
- Cold versus retargeting.
- Length of the consideration period.
- Applying a fixed cap to every audience.
- Reading frequency without CTR or CPA.
- Comparing different time ranges.
- Refreshing creative too early based on a single day.
A closer look
Common questions.
- What is ad frequency?
- It is the average number of times a person saw your ad, impressions divided by reach.
- What frequency is too high?
- It depends on audience and product. Watch for rising frequency with falling results.
- How do I lower frequency?
- Widen the audience, lower budget or add fresh creative.
- Does reach double count people?
- Reach counts unique people, but platforms estimate it and it can vary by setup.
- Is frequency the same as fatigue?
- No. Fatigue is the effect on results, and frequency is one signal of it.