Are the DM Calc calculators free to use?

Yes. All 12 calculators on DM Calc are completely free to use. There is no sign-up, no subscription and no usage limit.

What is CTR in digital marketing?

CTR (Click-Through Rate) is the percentage of people who click on an ad or link after seeing it. It is calculated by dividing the number of clicks by the number of impressions and multiplying by 100. A higher CTR typically signals more relevant and compelling creative.

How do I calculate CPA in digital marketing?

CPA (Cost Per Acquisition) is calculated by dividing the total campaign spend by the number of conversions or acquisitions. For example, if you spend $500 and acquire 25 customers, your CPA is $20.

What is a good conversion rate for digital marketing?

Average conversion rates vary widely by industry and channel. E-commerce sites typically see 1–4%, while lead generation pages can reach 5–15%. The best benchmark is your own historical performance — consistent improvement over time matters more than hitting a universal number.

Free Digital Marketing Calculators – CTR, CPC, CPM, ROAS, ROI & More

Q: What is the difference between ROAS and ROI?

ROAS (Return on Ad Spend) measures revenue generated per dollar spent specifically on advertising. ROI (Return on Investment) is a broader metric that measures net profit relative to total investment cost, including all associated expenses beyond ad spend.

Stop switching between spreadsheets and scraps of paper every time you need a quick metric. DM Calc gives digital marketers — from agency juniors to seasoned CMOs — a set of fast, accurate, always-free calculators for the numbers that matter most.

12 free calculators No sign-up required No ads or paywalls Works on mobile & desktop Instant results

All Digital Marketing Calculators

Pick a calculator below to get started. Each tool includes the formula used, plain-English explanations and benchmarks to contextualise your results.

Why Use DM Calc?

Digital marketing runs on metrics, but pulling them up mid-meeting — or in a client call — shouldn't require a spreadsheet, a whiteboard, or a three-step Google search. DM Calc was built on a simple premise: the formulas you already know should be one click away.

Always free. No freemium tiers, no credit-card prompts. Every calculator is fully accessible at no cost.
No account needed. Open a calculator, enter your numbers, get your answer. Nothing to install or register.
Built for real workflows. Optimised for the moments that matter — monthly reporting, live client presentations, quick campaign sense-checks.
Mobile-friendly. Every calculator works on any screen size, so you're never stuck without the right figure.

Built by Iulian Grecu

Iulian is a digital marketer with over a decade of experience running paid and organic campaigns. He built DM Calc to solve the exact problem he faced daily: spending too long on routine marketing maths instead of acting on the numbers.

Frequently Asked Questions

Are all the calculators free?

Yes — every calculator on DM Calc is completely free. There is no sign-up, no subscription plan and no usage cap. All 12 tools are accessible to anyone with a browser.

What is CTR and why does it matter?

CTR (Click-Through Rate) is the percentage of people who click an ad or link after seeing it. It is calculated as (Clicks ÷ Impressions) × 100. A higher CTR indicates that your creative and targeting are resonating with the audience and is used to optimise ad quality scores on platforms like Google Ads.

What is the difference between ROAS and ROI?

ROAS measures revenue generated per dollar spent on ads specifically (Revenue ÷ Ad Spend). ROI is a broader measure that divides net profit by total investment — including production costs, tools and labour — not just media spend. Use ROAS to optimise campaigns and ROI to evaluate overall business profitability.

How do I calculate CPA?

CPA (Cost Per Acquisition) = Total Campaign Spend ÷ Number of Conversions. For example, spending $500 to generate 25 leads gives a CPA of $20. A healthy CPA sits below your customer's gross margin or LTV, ensuring each acquisition is profitable.

What is a good conversion rate for a landing page?

Average conversion rates vary widely by industry and channel — typically 1–4% for e-commerce and 5–15% for lead generation pages. Rather than chasing an industry benchmark, focus on consistently improving your own baseline through A/B testing and conversion rate optimisation (CRO).

💡 Google Chrome user? Try the free Percentage Change Calculator Chrome Extension — calculate percentage changes directly in your browser without leaving the page you're on.