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Reach & Frequency Calculator

Marketing

Calculate average ad frequency and reach percentage instantly. Enter total impressions, unique reach, and target audience size for a full media plan breakdown.

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100500,000,000

Average Frequency

3.33
Reach % of Target Audience
30.00%
Unreached Audience
350,000

This calculator computes your Average Frequency, Reach % of Target Audience, Unreached Audience from the values you enter.

Inputs
Total ImpressionsUnique Reach (People)Target Audience Size
Outputs
Average FrequencyReach % of Target AudienceUnreached Audience

What is a Reach & Frequency?

A Reach & Frequency Calculator breaks down a media campaign's total impressions into the two numbers that actually describe audience exposure: how many unique people saw the ad (reach), and how many times each of them saw it, on average (frequency). These two figures multiply together to produce total impressions, which is the number most ad platforms report by default — but impressions alone can't tell you whether you reached a broad audience lightly or a narrow audience repeatedly.

This distinction matters enormously for campaign strategy. A campaign with 500,000 impressions delivered to 150,000 unique people (an average frequency of 3.33) behaves very differently from a campaign with the same 500,000 impressions delivered to only 50,000 people (a frequency of 10) — the first is a broad-awareness play, the second is a heavy retargeting or high-frequency conversion push against a narrow group.

This calculator also compares your reach against a defined target audience size, showing both what percentage of that audience you actually touched and how many people remain completely unreached — a number directly useful for justifying budget increases or additional placements in the next planning cycle, and a natural companion to Share of Voice analysis against competitors in the same market.

How to use this Reach & Frequency calculator

  1. Enter your Total Impressions — the total ad views delivered, as reported by your ad platform or media plan.
  2. Enter your Unique Reach — the number of distinct people exposed, also typically available in platform reporting or third-party measurement tools.
  3. Enter your Target Audience Size — the total size of the market segment you're trying to reach.
  4. Read the Average Frequency result and compare it against the 3–7 effective frequency benchmark for your campaign objective.
  5. Check Reach % of Target Audience to see how broadly the campaign performed against your full addressable market.
  6. Review Unreached Audience to quantify the remaining opportunity and decide whether to expand budget, placements, or flight duration.

Formula & Methodology

Average Frequency = Total Impressions ÷ Unique Reach

Reach % of Target Audience = Unique Reach ÷ Target Audience Size × 100

Unreached Audience = Target Audience Size − Unique Reach

Worked example: A campaign delivering 500,000 impressions to 150,000 unique people, against a target audience of 500,000:

Average Frequency = 500,000 ÷ 150,000 = 3.33

Reach % = 150,000 ÷ 500,000 × 100 = 30%

Unreached Audience = 500,000 − 150,000 = 350,000

This campaign sits within the effective frequency range but has only reached 30% of its target market, leaving 350,000 people — a substantial opportunity — completely untouched.

Frequently Asked Questions

Reach is the number of unique people exposed to your ad at least once, while frequency is the average number of times each of those people saw it. The two combine into total impressions — Impressions = Reach × Frequency — making them the foundational building blocks of any media plan, whether for TV, digital display, or paid social.
Average Frequency = Total Impressions ÷ Unique Reach. For example, a campaign delivering 500,000 impressions to 150,000 unique people has an average frequency of 3.33, meaning the typical person in the audience saw the ad a little over three times during the campaign.
Media planning research generally points to a frequency of 3–7 exposures as the range where ad recall and message retention are strongest without triggering fatigue, often called the 'effective frequency' zone. Below 3, many viewers may not retain the message at all; above 7–10, additional exposures typically add diminishing returns and can start to annoy the audience.
Reach counts unique people exposed to an ad, regardless of how many times they saw it, while impressions count every single ad view, including repeat views from the same person. A campaign can have 1 million impressions but only 200,000 reach if the average person saw the ad five times — impressions alone don't tell you how broad or narrow your actual audience exposure was.
Reach percentage shows what portion of your defined target audience was actually exposed to the campaign, which matters for judging whether media buys were broad enough to matter strategically. A campaign reaching only 10% of a target market, even with strong frequency and engagement among those reached, may need a larger budget or broader placement mix to move overall brand metrics.
It depends on the campaign objective — brand awareness and new product launches typically prioritize reach to introduce the message to as many people as possible, while retargeting and conversion-focused campaigns often prioritize frequency against a smaller, higher-intent audience who already know the brand. Budget-constrained campaigns usually face a direct tradeoff, since spreading the same budget across a wider reach necessarily lowers average frequency.
Frequency capping limits how many times an individual user sees an ad within a set period, preventing over-exposure that wastes budget on diminishing-return impressions and can cause ad fatigue or brand annoyance. Most programmatic and social platforms let advertisers set explicit frequency caps (for example, no more than 5 impressions per user per week) as a direct control on the average frequency this calculator reveals.
Enter your campaign's Total Impressions, Unique Reach (the number of distinct people exposed), and your Target Audience Size. The calculator instantly returns Average Frequency, Reach % of Target Audience, and Unreached Audience — the number of people in your target market the campaign didn't touch at all.
Unreached audience quantifies the size of the opportunity your current campaign left untouched, which is directly useful for deciding whether to increase budget, add placements, or extend flight dates. A campaign leaving millions of target-audience members completely unreached, even with strong frequency among those it did reach, has significant untapped growth potential in its next planning cycle.
CPM tells you the cost per 1,000 impressions, but doesn't by itself reveal how those impressions are distributed across unique people versus repeat views. Two campaigns with identical [CPM](/cpm-calculator/) and total spend can have very different reach and frequency profiles depending on targeting breadth, which is why media plans should always be evaluated on reach and frequency alongside cost efficiency.
Cross-platform reach is notoriously hard to measure precisely, since the same person may be counted as unique reach separately on Facebook, YouTube, and a display network, inflating true unduplicated reach when totals are simply summed. Platforms and third-party measurement tools use deduplication methodologies (often based on login data or probabilistic matching) to estimate true cross-platform reach, but some double-counting is nearly unavoidable without a single unified measurement partner.
Also known as
reach and frequency calculatorad frequency calculatormedia planning calculatoraverage frequency formulareach percentage calculator