SaaS Churn & LTV Calculator — Free MRR Metric Tool
Calculate churn rate, customer lifetime value, LTV-to-CAC ratio, and project MRR growth over 12 months.
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12-Month MRR Projection
Frequently Asked Questions
A healthy LTV-to-CAC ratio is 3:1 or higher. Below 3:1 means you're spending too much on acquisition. Above 5:1 suggests under-investment in growth. The sweet spot is 3:1 to 5:1.
Monthly churn = lost customers / total customers at month start x 100. Example: lose 15 of 500 customers = 3% churn. Healthy SaaS churn is under 5% monthly.
MRR (Monthly Recurring Revenue) is your predictable subscription revenue. It's the core metric for valuation, growth tracking, and runway planning. MRR growth = new MRR + expansion MRR - churned MRR.
LTV = ARPU / monthly churn rate. If ARPU is $50 and monthly churn is 3%, LTV = $50 / 0.03 = $1,667. This is the expected revenue from a customer before they churn.
Track: MRR and MRR growth rate, monthly churn rate, customer LTV, LTV-to-CAC ratio, and total active customers. These five give you unit economics, growth trajectory, and capital efficiency.