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Free CTR Calculator

Calculate click-through rate instantly from campaign clicks and impressions. Get CTR percentages and supporting metrics.

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Tool 01

CTR Calculator

Calculate click-through rate from clicks and impressions with deterministic math.

CTR Calculator

Calculate click-through rate from clicks and impressions.

Clicks

Impressions

CTR results

Click-through rate

1.51%

Clicks per 1,000 impressions

15.07

{
  "error": null,
  "ctr": 1.5066828675577157,
  "cpmClicks": 15.066828675577158,
  "clicks": 124,
  "impressions": 8230
}

How it works

CTR Calculator: methodology and worked example

How this tool computes its result

Calculates click-through rate as (clicks / impressions) * 100, and a secondary figure — clicks per 1,000 impressions — as (clicks / impressions) * 1000 (the same ratio at a different scale, useful for comparing against CPM-style reporting). Impressions must be greater than zero and clicks cannot be negative; either violation returns an inline error and zeroed metrics instead of a result.

Worked example

With the tool's default values, clicks=124 and impressions=8230: ctr = 124/8230*100 = 1.5066...%, displayed as 1.51%. cpmClicks = 124/8230*1000 = 15.07.

When not to use this tool

Unlike the other marketing calculators in this tool set, this one has no benchmark tiers or status labeling ('excellent'/'good'/etc.) — it returns the raw rate only, so it can't tell you whether a given CTR is actually competitive for your channel or ad format.

Common mistakes

- Setting impressions to 0 to test an edge case — explicitly blocked with 'Impressions must be greater than zero' since the ratio would be undefined.
- Entering a negative clicks value — blocked with 'Clicks cannot be negative', but clicks greater than impressions is not validated and will silently produce a CTR above 100%.
- Reading the 'cpmClicks' field in the JSON output as a cost figure — it is clicks scaled per 1,000 impressions, not a CPM dollar amount.

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