Full-funnel ROI Calculator

From budget to real profit — and lifetime value

Most calculators stop at clicks. This one runs the full funnel: budget → impressions → clicks → conversions → CPA → revenue → gross and net profit → ROI. Then it goes further, projecting customer lifetime value from repeat purchases and retention, and the all-important LTV:CAC ratio.

The ratio that matters: LTV:CAC

A single sale can look unprofitable while the customer relationship is highly profitable. LTV:CAC compares what a customer is worth over time to what they cost to acquire. Below 1:1 you lose money; around 3:1 is the healthy SaaS/eCom benchmark; well above it, you can afford to invest more in acquisition.

Frequently asked questions

Where do the preset values come from?

They reflect typical French-market ranges for CPC, CTR and conversion by channel. Pick the closest, or enter your own real figures for an accurate projection.

What does LTV:CAC tell me?

It's lifetime value divided by acquisition cost. Under 1 you lose money per customer; ~3 is healthy; higher means you have room to scale acquisition.

Are overheads included?

No — this is unit economics on media spend. Salaries, rent and creative costs aren't included, so net profit here is contribution before fixed costs.