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Marketing & SEO Calculators

7 free calculators

Ad spend, ROAS, CTR, conversion and engagement metrics. Every marketing & seo calculator on CalClu is free, works instantly as you type and needs no sign-up, so you can get a reliable answer in seconds on your phone or computer.

This category currently includes Conversion Rate Calculator, CPC (Cost per Click) Calculator, CPM (Cost per 1,000 Impressions) Calculator, CTR (Click-Through Rate) Calculator, Customer Acquisition Cost (CAC) Calculator, ROAS (Return on Ad Spend) Calculator and Social Media Engagement Rate Calculator. Each tool shows the formula it uses alongside the result, so you can follow the working instead of trusting a black box.

To use a calculator, pick a tool, enter your numbers and read the result straight away. Change any value to compare scenarios, and copy the page link to bookmark or share a calculation. Results are estimates for general information; for important financial, medical, legal or engineering decisions, confirm the numbers with a qualified professional.

Can't find what you need? Use the search at the top of the page (Ctrl K) or browse every calculator from A to Z. New marketing & seo tools are added regularly, and suggestions from visitors help decide what we build next.

Popular in Marketing & SEO

Conversion Rate CalculatorPercent of visitors who bought, signed up or converted, from conversions and total visitorsCPC (Cost per Click) CalculatorAverage cost per click of an ad campaign from total ad cost and number of clicksCPM (Cost per 1,000 Impressions) CalculatorAdvertising cost per thousand impressions or views from total ad cost and impressionsCTR (Click-Through Rate) CalculatorPercent of people who clicked an ad, email or link, from clicks and impressions

All marketing & seo calculators

Conversion Rate CalculatorPercent of visitors who bought, signed up or converted, from conversions and total visitorsCPC (Cost per Click) CalculatorAverage cost per click of an ad campaign from total ad cost and number of clicksCPM (Cost per 1,000 Impressions) CalculatorAdvertising cost per thousand impressions or views from total ad cost and impressionsCTR (Click-Through Rate) CalculatorPercent of people who clicked an ad, email or link, from clicks and impressionsCustomer Acquisition Cost (CAC) CalculatorAverage cost to win one new customer from total marketing and sales spend and new customers gainedROAS (Return on Ad Spend) CalculatorRevenue earned for every dollar spent on ads, from ad revenue and ad spendSocial Media Engagement Rate CalculatorEngagement rate of a social media post from likes, comments, shares and follower count

Marketing & SEO guides

ROAS, CPC, CTR and CPM: Ad Metrics in Plain EnglishThe core paid-advertising metrics, CTR, CPC, CPM, conversion rate, CAC and ROAS, with simple formulas and one worked example that ties them together.2 min read

Frequently asked questions

Are the marketing & seo calculators free?

Yes. Every calculator on CalClu is free, and you never need an account to calculate.

How accurate are the results?

Each calculator uses standard, published formulas and shows how the answer is worked out. Results are estimates for general information, so double-check anything important with a qualified professional.

Can I suggest a new marketing & seo calculator?

Yes, please do. Send your idea through the Contact page and tell us what you'd like to calculate.