Click-Through Rate Calculator Formula

Understand the math behind the click-through rate calculator. Each variable explained with a worked example.

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Formulas Used

Click-Through Rate

ctr = impressions > 0 ? (clicks / impressions) * 100 : 0

Impressions Per Click

impressions_per_click = clicks > 0 ? impressions / clicks : 0

Variables

VariableDescriptionDefault
clicksTotal Clicks250
impressionsTotal Impressions10000

How It Works

How to Calculate Click-Through Rate

Formula

CTR = (Clicks / Impressions) x 100

CTR measures how compelling your ad, email subject line, or search listing is at generating action. It reflects the relevance and appeal of your creative to the audience who sees it. Higher CTR generally indicates better targeting and more engaging copy. In Google Ads, higher CTR also improves your quality score, which lowers your cost per click.

Worked Example

An ad receives 250 clicks out of 10,000 impressions.

clicks = 250impressions = 10000
  1. 01CTR = (250 / 10,000) x 100 = 2.5%
  2. 02Impressions Per Click = 10,000 / 250 = 40
  3. 03One in every 40 people who saw the ad clicked it.

Frequently Asked Questions

What is a good CTR?

Google Search ads average 3-5%. Display ads average 0.3-0.5%. Email marketing averages 2-3%. Social media varies from 0.5-2%. Branded keyword searches can exceed 10%. Context matters enormously.

Does a high CTR guarantee good results?

No. High CTR with low conversion rates means you attract clicks but fail to deliver on the promise. Optimize for the full funnel: CTR drives traffic, but conversion rate and CPA determine business impact.

Learn More

Guide

Marketing ROI Guide

Learn how to calculate and improve marketing ROI. Covers ROAS, cost per acquisition, cost per lead, attribution models, and channel-level performance analysis.

Ready to run the numbers?

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