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Marketing ROI Calculator

Enter your monthly visitors, conversion rates, customer value and monthly cost. The calculator applies the stated formula only — no provider data, no model guesses — and prints its assumptions alongside the result so you can check the maths before you trust it.

Guest
1 run per UTC day
Signed in
3 daily runs
Subscriber
Unlimited

Method

Better inputs, better evidence

  1. 01

    Use your last full month's visitor and lead numbers for a grounded baseline.

  2. 02

    ROI and payback show as unavailable when their denominator is zero — that is the honest answer, not an error.

Unavailable metrics are never silently estimated. AI suggestions remain drafts until you verify them against your own evidence.

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