What Is Click-Through Rate (CTR)?
Click-Through Rate (CTR) is a core digital-marketing metric that measures how often people who see an advertisement, link, or email actually click on it. Expressed as a percentage, it tells you how compelling and relevant your creative and targeting are. CTR is universal across search ads, display ads, social campaigns, and email, so this calculator applies worldwide with no region-specific rules.
How to Use This Calculator
Enter the total number of Clicks your ad received and the number of Ad Impressions (the number of times the ad was displayed). Click calculate and the tool returns your CTR as a percentage. Both values are plain counts — no units or currency are involved.
The Formula Explained
The calculation divides clicks by impressions and multiplies by 100 to convert the ratio into a percentage:
$$\text{CTR} = \frac{\text{Clicks}}{\text{Impressions}} \times 100\%$$
If impressions is zero, CTR is undefined (you cannot divide by zero), so the tool guards against that case. Typical CTR values are small — often between 0.5% and 5% — so the result is shown to several decimal places.
Worked Example
Suppose your ad was shown 1,000 times and clicked 15 times. $$\text{CTR} = \frac{15}{1{,}000} \times 100 = 0.015 \times 100 = 1.5\%$$ As a second example, 250 clicks on 5,000 impressions gives $$\frac{250}{5{,}000} \times 100 = 5\%$$
FAQ
What is a good CTR? It depends on the channel and industry. Search ads often see 2–5%+, while display ads may be well under 1%. Compare against your own historical benchmarks.
Can CTR exceed 100%? Mathematically yes, if clicks are greater than impressions — but that usually signals a data-entry or tracking error, since each impression can normally yield at most one click.
Does this work for email open or reply rates? Yes. The same ratio works for any "successes out of total shown" rate; just substitute the relevant counts.
