---
title: "CTR calculator: work out clicks divided by impressions"
description: "Calculate website search CTR from clicks and impressions, combine rows correctly, and compare matched periods before deciding which page needs review"
canonical: "https://scalewithsearch.com/articles/ctr-calculator-website-search-results"
---
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# CTR calculator: work out clicks divided by impressions

To calculate click-through rate, divide clicks by impressions. Multiply the result by 100 to express it as a percentage. Use clicks and impressions from the same report selection and period.

Google Search Console defines CTR as clicks divided by impressions. Its metric documentation explains how clicks and impressions are counted for different result types. [Google Search Console metric definitions, checked 2026.10.23](https://support.google.com/webmasters/answer/7042828?hl=en).

The calculations below use hypothetical numbers. They are examples of arithmetic, not targets for your website.

## Use the formula with matched inputs

Suppose a page received 45 clicks from 1,500 impressions in the selected period.

```text
CTR percentage = clicks / impressions * 100
45 / 1500 * 100 = 3%
```

For a spreadsheet, enter clicks in A2 and impressions in B2. Enter `=A2/B2` in C2 and format C2 as a percentage. Do not also multiply by 100 when using percentage formatting.

If impressions are zero, the ratio is undefined. Leave the result blank or label it unavailable. Do not present the absence of a denominator as a measured zero-percent CTR.

## Combine counts before calculating a total

Add clicks and impressions across compatible rows, then calculate the ratio. An ordinary average of row percentages gives each row equal weight, regardless of its impressions.

Consider these hypothetical rows:

| Page | Clicks | Impressions | CTR |
|---|---:|---:|---:|
| Service page | 20 | 200 | 10% |
| Guide | 20 | 1,800 | 1.11% |
| Combined | 40 | 2,000 | 2% |

The combined calculation is `40 / 2000 * 100 = 2%`. Averaging 10% and approximately 1.11% produces approximately 5.56%, which does not describe these combined counts.

Use the totals supplied for the report selection when that is the quantity you intend to describe. Avoid reconstructing a different total from a partial list of rows.

## Record what the report includes

Before comparing results, write down the date range, search type, page filter, and any query, country, or device filters. Keep those choices consistent when the question calls for a matched comparison.

Search Console provides those metrics, dimensions, and filtering choices in its Performance report. Its default period can be changed. Check the displayed selection rather than assuming what it contains. [Google Performance report guidance, checked 2026.10.23](https://support.google.com/webmasters/answer/7576553?hl=en).

For a local business, a proposed review could compare one service page over two equal periods using the same filters. Label that choice as your analysis plan.

## Separate percentages from percentage points

In another hypothetical example, CTR changes from 2% to 3%. The change is one percentage point. The relative increase is 50%, calculated as `(3 - 2) / 2 * 100`.

Use the term that matches the calculation. Keep the underlying counts beside the percentages so the reviewer can see the volume involved.

## Turn the result into a page review

Treat a CTR change as a reason to investigate. Inspect the selected queries, the page, and the actual business question before rewriting copy. The number alone does not establish why people clicked.

Record each proposed page change and its publication date. Compare future observations with the same reporting choices where practical. Avoid turning one arithmetic example into a universal performance threshold.

Use the [marketing report guide](/articles/seo-reporting-marketing-managers) to retain the period and filter choices with each result. The [forecasting guide](/articles/seo-forecasting-models) addresses future scenarios when your decision requires more than a historical ratio.

The [SEO KPI guide](/articles/seo-kpis-by-role) places search metrics within a wider review. Bring the page URL, matched report exports, and the decision you want to make to [Scale With Search's written scope form](/work).


## Related: SEO by role

- [Replace vanity SEO metrics with revenue, CAC, and conversion reporting](/articles/seo-reporting-marketing-managers)
- [Build SEO traffic forecasts that give leadership a range to plan against](/articles/seo-forecasting-models)
- [Choose the SEO metrics each role in your company should track](/articles/seo-kpis-by-role)

----

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Scale With Search  2026  [scalewithsearch.com](https://scalewithsearch.com)
```
