SaaS Metrics Calculator
Calculate MRR, ARR, churn, retention, CAC, LTV, payback, and Rule of 40—then forecast how your subscription business grows.
Enter your SaaS numbers
Use one consistent monthly reporting period for all inputs.
Monthly recurring revenue
Add your active subscription plans. Annual contracts should be divided by 12.
MRR movement this month
Separate recurring revenue gained and lost during the reporting period.
Customer movement
Track logo churn separately from recurring-revenue churn.
Acquisition and profitability
Add sales and marketing costs to calculate unit economics.
Your SaaS health dashboard
Calculated instantly from your monthly subscription data
MRR movement waterfall
What moved recurring revenue this month
Retention and churn
Customer and recurring-revenue durability
Unit economics
Acquisition cost versus customer value
Recurring-revenue forecast
Baseline compared with your improved-churn scenario
Rule of 40
Growth plus profitability
Rule of 40 is a screening framework, not a universal target. Interpret it in the context of company stage and accounting choices.
Priority insights
Calculated from the weakest levers in this scenario
Complete metric summary
Definitions and formulas for your reporting pack
| Metric | Result | Formula | Interpretation |
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How to calculate MRR, churn, LTV, and CAC
Recurring-revenue metrics tell a connected story. MRR measures subscription scale, retention shows how durable that revenue is, and LTV:CAC indicates whether acquiring customers creates enough long-term value.
MRR = sum of normalized monthly subscriptions · ARR = MRR × 12(Starting MRR − churned MRR − contraction MRR + expansion MRR) ÷ starting MRRARPA × gross margin ÷ monthly customer churn rateCAC = acquisition spend ÷ new customers · Payback = CAC ÷ (ARPA × gross margin)Normalize subscriptions before calculating MRR
Convert quarterly and annual contracts to their monthly equivalent. Exclude implementation fees, hardware, consulting, and other one-time revenue. MRR should contain predictable recurring subscription revenue.
Why one healthy metric is not enough
Rapid new sales can hide high churn, while a strong LTV estimate can be misleading when based on a short operating history. Read growth, retention, gross margin, acquisition cost, and payback together—and compare cohorts as the business matures.
This calculator provides directional business estimates, not accounting, financial, tax, legal, or investment advice. Validate important decisions against your billing, finance, and cohort data.