CTR Calculator Online
Calculate click-through rate, clicks or impressions from any two values, right in your browser. Nothing is uploaded.
The CTR Calculator runs entirely in your browser. The CTR, clicks, and impressions you enter never leave your device and are not uploaded to ArrayKit.
Open the CPM Calculator
About CTR Calculator
CTR Calculator solves click-through rate, clicks, or impressions the moment you fill in any two of the three values. Type a CTR percentage and an impression count to see how many clicks that implies, or enter clicks and impressions to see the resulting rate. The math follows the standard formula — CTR = clicks ÷ impressions × 100 — rearranged automatically depending on which fields you leave blank. It is built for media buyers, ad ops teams, and marketers who need to sanity-check a campaign report, reverse-engineer a target CTR into a click goal, or estimate the impression volume needed to hit a click quota. Results update live as you type, with a copyable summary for pasting into a report. Everything runs locally in your browser — no campaign numbers leave your device.
Features
- Solves for CTR, clicks, or impressions from any two known values
- Live results update as you type, no calculate button needed
- Handles decimal CTR percentages down to four decimal places
- Guards against divide-by-zero and impossible inputs like clicks exceeding impressions
- One-click copy of a formatted CTR, clicks, and impressions summary
- Clear warnings when too many or too few fields are filled in
- Accepts pasted numbers with thousands separators or a percent sign
- Runs entirely in your browser with no campaign data sent anywhere
How to use the CTR Calculator
- Enter any two of CTR, clicks, or impressions
- Leave the third field blank so it can be calculated
- Read the result row for the computed value
- Copy the CTR, clicks, and impressions summary for your report
Example
Input
clicks 50, impressions 10,000
Output
CTR = 0.5%
50 clicks ÷ 10,000 impressions × 100 = 0.5% CTR.
Common errors & troubleshooting
- The CTR Calculator shows 'Clicks cannot exceed impressions.' — A click-through rate above 100% is not possible from real ad delivery — double-check that the clicks and impressions figures are from the same date range and ad unit.
- Result shows 'Enter an impression count greater than 0.' — Impressions is the divisor in the CTR formula, so it must be a positive number. Zero impressions with any clicks is not a valid campaign state.
- All three fields are filled and nothing calculates. — Clear one field — the CTR Calculator solves the blank field from the other two, so only two values should be entered at a time.
- CTR looks tiny, like 0.0032%, and is hard to read. — Very low CTRs are normal for display ads; the calculator shows up to four decimal places so small rates stay precise instead of rounding to 0%.
Frequently asked questions
- What does the CTR Calculator actually compute?
- Given any two of CTR, clicks, and impressions, it computes the third using CTR = clicks ÷ impressions × 100, rearranged as needed. Fill in two fields and the third fills in automatically.
- How do I calculate CTR from clicks and impressions?
- Enter your clicks and impressions counts and leave the CTR field blank. The CTR Calculator divides clicks by impressions and multiplies by 100 to give you the percentage.
- Can the CTR Calculator find impressions from a target CTR and click goal?
- Yes. Enter a CTR percentage and a clicks target, leave impressions blank, and it computes the impression volume needed — useful for forecasting ad delivery.
- Why does the CTR Calculator reject clicks greater than impressions?
- Every click requires an impression to originate from, so clicks can never exceed impressions in valid ad data. That combination is flagged as an input error.
- Does the CTR Calculator upload my campaign numbers?
- No. All calculations happen locally in your browser. The CTR, clicks, and impressions you type never leave your device or get sent to ArrayKit.
- What is a good click-through rate?
- It varies widely by ad format and placement — search ads often see CTRs above 2%, while display banners are commonly well under 0.5%. The CTR Calculator just does the math; benchmarking against your own historical CTR is the most reliable comparison.
Related tools
- CPM Calculator — Calculate CPM, impressions or media cost from any two values, both ways.
- eCPM Calculator — Calculate eCPM from ad earnings and impressions, or reverse-solve either input.
- Fill Rate Calculator — Calculate ad fill rate from requests and impressions served, with unfilled counts.
- ROAS Calculator — Calculate return on ad spend, revenue or ad cost, with break-even ROAS.
- IAB Ad Size Reference — Look up IAB standard ad unit sizes by name or dimensions, like 300x250 and 728x90.
- Prebid Ad Unit Generator — Generate a Prebid.js ad unit config with media types, sizes and bidder params.
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