Cohort Retention Analysis Calculator

Compute retention and churn for a user cohort using start users, end users, and new-user inflow, and classify cohort health.

Users at period start

Users at period end

New users during period

How to Use the Cohort Retention Analysis Calculator

Enter users at the start of the period.
Enter users at the end of the period.
Enter how many new users joined during the period.
Click Calculate.

Casi d'Uso

•Product analytics retention reports.
•Subscription churn tracking.
•Growth-loop health checks.

Formula

Retention = (users end − new users) / users start × 100. Churn = 100 − retention.

Domande Frequenti

Why subtract new users?

Pure retention measures how many of the original cohort are still active. Without subtracting new inflow, growth would artificially inflate retention.

What is healthy retention?

For B2B SaaS, 90-day retention above 60% is considered healthy; mobile consumer apps often drop below 30% — benchmarks depend on category.

How often should I run cohort analysis?

Monthly cohorts are the standard cadence; weekly cohorts are useful for consumer apps with shorter feedback loops.