Calculate click-through rate from clicks and impressions, set a target CTR to see the click gap, and compare against common channel benchmarks. Offline.
Click-through rate is the ratio everyone quotes and almost nobody acts on directly, because a bare percentage doesn’t say what to actually do next. CTR Calculator computes the ratio, then answers the question that matters operationally: given where a campaign sits today, exactly how many more clicks does it need to reach a target, at the impression volume it already has.
Enter clicks and impressions to get the rate. Add an optional target CTR and a second card shows the click gap. A reference table of commonly cited CTR ranges by channel sits below the result for context on whether a number is actually good.
Click Load Sample and the fields fill with 450 clicks, 18000 impressions, and a target of 3. The rate comes out to 2.5%, and the gap card reports 90 more clicks needed at the current 18,000 impressions to reach 3%: 450 + 90 = 540, and 540 ÷ 18,000 is exactly 3%. Click Load Sample again and a 600-click, 18,000-impression scenario shows “Already at or above target CTR” instead, since 3.33% already clears a 2% target.
ceil(target% × impressions) − clicks, clamped to 0 so a target already met never shows a negative number.Impressions must be a whole number greater than 0, since it’s the divisor; leaving it at 0 or blank shows “Impressions must be greater than 0.” Clicks greater than impressions is rejected outright with “Clicks cannot exceed impressions.” since a click without a matching impression isn’t something any real ad platform reports. A target outside 0 to 100 shows a third, separate message rather than silently clamping to a nearby valid value.
Click-Through Rate
2.5%
Gap to 3% Target
90 more clicks needed at the current 18,000 impressions to reach 3%.
Commonly Cited CTR Ranges by Channel