CTR Calculator
Calculate click-through rate, work out the clicks needed for a target, or compare two campaigns using the same measurement period.
- Clicks
- 250
- Impressions
- 10,000
Clicks and impressions must cover the same campaign and time period.
Show working
CTR = clicks / impressions x 100 250 / 10,000 x 100 = 2.5%
Click-through rate formula
Click-through rate, or CTR, expresses clicks as a percentage of impressions. An impression is a recorded display of an ad, link or search result. It is not necessarily a unique person: the same person can generate more than one impression.
CTR = clicks / impressions x 100
A campaign with 250 clicks and 10,000 impressions has a 2.5% CTR. Keep the date range, campaign filters and measurement source consistent when entering the two counts. To express other part-to-whole relationships, use the percentage of total calculator.
How many clicks do you need?
Multiply impressions by the target CTR, then divide by 100. If the result is fractional, round up to find the minimum whole number of clicks that reaches the target.
At 1,250 impressions, a target CTR of 3% requires 37.5 clicks mathematically. You need 38 actual clicks, producing a CTR of 3.04%. The calculator shows both the target and the rate achieved after rounding.
Solving for impressions works in the other direction: impressions = clicks / (CTR / 100). An exact result can be fractional, so a specified click count and CTR will not always correspond to a whole impression count.
Compare CTR without confusing points and percent
If campaign A has a CTR of 2.5% and campaign B has a CTR of 4%, B is 1.5 percentage points higher. Relative to A, that is a 60% increase: (4 – 2.5) / 2.5 x 100.
Both descriptions are valid, but they answer different questions. The percentage points calculator explains this distinction in more detail. If A has zero CTR, a relative increase from A is undefined; the percentage-point difference is still available.
For a combined campaign rate, add the clicks, add the impressions, then divide the totals. Do not average two CTRs equally unless their impression counts are equal. The average percentage calculator can combine more than two groups.
CTR, cost and campaign performance
To measure what happens after the click, use the conversion rate calculator. It compares converted visitors or sessions with their traffic totals and can combine campaign counts.
CTR measures response to an impression, not profitability or sales. A high click rate can still produce few conversions. Review it alongside the campaign’s purpose, conversion data and costs.
The CPM calculator connects campaign spending with impressions. Where the counts and spend refer to the same campaign, implied cost per click is CPM / (10 x CTR), using CTR as a percentage number. At a CPM of 5 and CTR of 2%, implied CPC is 0.25 in the same currency.
There is no single good CTR for every channel or placement. Compare like-for-like campaigns and your own history. This calculator does not apply a universal benchmark.
Common questions
What is the difference between clicks and unique clicks?
Clicks count recorded click events; unique-click metrics deduplicate according to the platform’s rules. Use the metric that matches the platform report you are checking, and do not mix it with a denominator from a different report.
Can CTR exceed 100%?
Some measurement systems can count repeated clicks against an impression. A result above 100% deserves a check of the source definitions, filters and time range. The calculator keeps the mathematical result and flags the unusual counts.
Does this calculate email click-to-open rate?
No. Click-to-open rate uses opens as its denominator. This tool uses impressions; email systems may define click-through rate using delivered emails, so check the report definition before comparing values.
Related calculators
Back to the Percent Calculator.