Calculator

Cohort Retention
calculator.

Calculate cohort retention curves and project LTV from early-stage data.

How we calibrated this
Used in growth engagements before we recommend channels.
Inputs

Tell us about your project.

This is a static reference card. For interactive calculators, talk to us — we tune the assumptions per client.

Day 1 retention

Range: 5–95 % · Default: 50 %

Day 7 retention

Range: 1–90 % · Default: 25 %

Day 30 retention

Range: 1–85 % · Default: 12 %

ARPU (USD/month)

Range: 1–500 USD · Default: 30 USD

How it's calculated

The formula.

Fit retention curve, integrate over 24 months × ARPU

Output

24-month projected LTV

Estimated lifetime value per user.

Output

CAC ceiling for 3:1

Maximum CAC for healthy unit economics.

Output

Retention curve verdict

Healthy, fragile, or pre-PMF.

Want a real estimate?

This is a band,
not a quote.

For a real estimate calibrated to your specific project, brief us. We get back within two business days.

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