Click-through rate and supporting figures
CTR compares clicks with the number of recorded displays, not the number of unique viewers. The target calculation holds impressions fixed and can produce a fractional expected click count.
To evaluate actual investment proceeds after measuring clicks, use the ROI Calculator with monetary costs rather than impression counts.
The formula
CTR compares clicks with the number of recorded displays, not the number of unique viewers. The target calculation holds impressions fixed and can produce a fractional expected click count.
Worked click through rate example
Two hundred fifty clicks from 10,000 impressions give a CTR of 2.5%. A 3% target at that volume corresponds to 300 clicks, or 50 more clicks.
How to use this calculator
- Enter recorded clicks, recorded impressions.
- Set target ctr using the stated units or choices.
- Calculate and compare click-through rate, clicks at target ctr, target minus recorded clicks.
Choosing inputs for click through rate
An impression records a display according to the platform’s measurement rules. It does not necessarily mean a person noticed the content, and the same person can generate several impressions. Use click and impression totals from the same campaign, channel, date range, and filtering settings.
CTR describes response to visibility rather than what happens after a click. A message can earn many clicks without generating purchases or qualified leads. When reviewing a campaign, keep the click-through result alongside downstream conversion and cost measures instead of treating it as a profit measure.
Interpreting click-through rate
The target input gives a concrete count at the observed impression volume. It does not forecast future traffic or normalize different audiences and placements. This implementation accepts nonnegative counts, requires at least one impression, and rejects clicks greater than impressions under its one-recorded-click-per-impression model. If your analytics definition differs, reconcile the exported totals before using that model.
Assumptions & limitations
What this calculation assumes
- Click and impression counts are whole numbers from one measurement scope.
- The modeled click count does not exceed the impression count.
What to keep in mind
- Viewability, unique reach, bot filtering, statistical uncertainty, and conversion quality are not calculated.
Common questions
Does CTR use unique visitors?
No. Its denominator is impressions, which can include repeated displays to the same person.
Does a higher CTR guarantee more sales?
No. CTR measures clicks relative to displays; conversion quality and revenue must be measured separately.
Why reject clicks greater than impressions?
This implementation assumes at most one counted click per recorded impression. Reconcile totals from a different measurement model before using it.
Sources & further reading
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