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Marketing ROI Calculator

Enter your spend, leads, conversion rate and average deal value to see your cost per lead, CAC, revenue, ROAS and ROI in real time.

By Nikhil Sharma · Updated 1 November 2026 · 3 min read

See what your marketing is really returning. Enter four numbers and get your cost per lead, customer acquisition cost, monthly revenue, ROAS and ROI — recalculated as you type.

Estimates for planning, based on your inputs. Real results depend on channel, offer and execution. Get a revenue plan →

How it's calculated

Customers = leads × conversion rate. Revenue = customers × average deal value. CPL = spend ÷ leads. CAC = spend ÷ customers. ROAS = revenue ÷ spend. ROI = (revenue − spend) ÷ spend. Simple, but it exposes where the economics break — usually a weak conversion rate or too low a deal value for the CAC.

Why it matters

Most marketing is judged on clicks and vanity metrics. This ties spend to revenue, the only number that matters. If your ROAS is below break-even, the fix is usually upstream — better conversion, higher-intent traffic, or higher lifetime value — not just more spend. Plan the channel split with our budget allocator.

Want us to build the engine that moves these numbers — and report on them for real? Request an invite, or see how we run B2B lead generation.

NS
Written & reviewed by Nikhil Sharma
Founder, Fabulous Media
Nikhil has led growth for 850+ brands across 35 nations since 2008. Fabulous Media is an invitation-only growth agency that reports on pipeline and revenue, not vanity metrics. Meet the team · Request an invite.

Questions, answered

Marketing ROI = (revenue generated minus marketing spend) divided by marketing spend, expressed as a percentage. This calculator derives revenue from your leads, lead-to-customer conversion rate and average deal value.

It depends on your margins — low-margin businesses need a higher ROAS to profit. A common starting target is around 4x, but the real answer is the ROAS at which you make money after all costs.

ROAS compares revenue to ad or marketing spend only; ROI compares profit to all costs. ROAS can look healthy while ROI is negative once every cost is counted, so use both.

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