Kossin Labs / Free tools

Free LTV:CAC calculator

See what a customer is worth, how that compares to what it costs to win them, and how long until you get that cost back. Everything runs in your browser. Nothing is saved or sent.

Per customer

ARPU per month ($) Gross margin (%) Monthly churn (%) CAC, blended ($)

Optional

New customers per month

These are made-up example numbers. Replace them with yours.

Customer lifetime

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LTV (gross-margin based)

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LTV : CAC

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CAC payback

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Acquisition spend

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Value of a month's new customers, after CAC

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How it works

Lifetime is 1 ÷ monthly churn. LTV is ARPU × gross margin ÷ monthly churn. LTV:CAC is LTV ÷ CAC. CAC payback is CAC ÷ (ARPU × gross margin). These are averages that assume steady churn and pricing, so treat them as a quick check, not a forecast.

More detail: how to calculate LTV and CAC payback. For runway, use the runway calculator.