Divide reported unique email clickers by recorded unique openers from one matched campaign and reporting window.
Reported click-to-open rate
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Recorded opens may include privacy preloads; clicks may include automated activity. This ratio does not measure verified human reading or prove creative effectiveness.
Unique clickers ÷ recorded unique openers × 100
ONE CLEAR OPERATING QUESTION
250 clickers over 1,000 recorded openers gives 25%; no recorded openers makes the ratio undefined, not zero.
Recorded opens may include privacy preloads; clicks may include automated activity.
250 clickers over 1,000 recorded openers gives 25%; no recorded openers makes the ratio undefined, not zero.
THE FIELD NOTES
Use the result now, then read the practical notes for assumptions, examples, limitations, and the choices behind it.
250 ÷ 1,000 × 100 = 25.00%. Recorded opens may include privacy preloads and clicks may include automated activity.
Divide unique recipients who clicked by recorded unique openers from one matched campaign and reporting window, then multiply by 100. Do not use total clicks, summed link uniques, delivered messages or impressions.
250 unique clickers divided by 1,000 recorded unique openers equals 25.00%. This is report arithmetic, not proof that one quarter of human readers engaged.
Use the email click-through rate calculator when you want unique clickers as a share of delivered emails rather than recorded openers. Use the email open rate calculator to inspect the separate recorded-opens-to-delivered ratio; recorded opens can still be affected by privacy preloading.
Recorded opens may include privacy preloads and clicks may include automated activity. Zero openers makes CTOR undefined. Ratios above 100% retain the entered arithmetic with a scope/tracking warning, without inferring a cause, human engagement, creative impact or sales.
THE PRODUCT IS NEXT
Divide unique recipients who clicked by recorded unique openers from one matched campaign and reporting window, then multiply by 100. Do not use total clicks, summed link uniques, delivered messages or impressions.
250 unique clickers divided by 1,000 recorded unique openers equals 25.00%. This is report arithmetic, not proof that one quarter of human readers engaged.
Use the email click-through rate calculator when you want unique clickers as a share of delivered emails rather than recorded openers. Use the email open rate calculator to inspect the separate recorded-opens-to-delivered ratio; recorded opens can still be affected by privacy preloading.
Recorded opens may include privacy preloads and clicks may include automated activity. Zero openers makes CTOR undefined. Ratios above 100% retain the entered arithmetic with a scope/tracking warning, without inferring a cause, human engagement, creative impact or sales.
CTOR divides unique clickers by recorded unique openers. Email CTR uses delivered messages as its denominator, so the two ratios answer different reporting questions.
CTOR is not defined when the recorded unique-opener count is zero. The tool does not replace that undefined ratio with zero percent.
No. Privacy image preloads can affect recorded opens and automated systems can affect clicks; these counts do not verify human reading or creative effectiveness.
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