About LTV CAC Ratio Calculator: SaaS Unit Economics
Estimate LTV, LTV:CAC ratio, monthly gross profit, and CAC payback from ARPU, margin, churn, and acquisition cost.
Change the example inputs to match a scenario and review the methodology and limitations before using the result in a decision. Calculations run locally in your browser.
How the calculation works
Simplified LTV
Monthly ARPU × gross margin ÷ monthly customer churn.
LTV:CAC
Estimated LTV ÷ customer acquisition cost.
How to use this calculator
- 1Replace the example values with internally consistent inputs.
- 2Review all result cards and any not-applicable state.
- 3Compare multiple scenarios and verify important assumptions independently.
Understanding the result
Compare cohorts and definitions consistently.
A zero churn rate cannot produce a finite LTV under this formula.
Important limitations
- Outputs are planning estimates and do not include every provider, accounting, financing, tax, legal, or operational factor.
- Invalid divisions are shown as not applicable rather than NaN or Infinity.
- LTV formulas vary; this simplified steady-state method omits discount rates and cohort changes.
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Frequently asked questions
What does the LTV CAC Ratio Calculator: SaaS Unit Economics calculate?
Estimate LTV, LTV:CAC ratio, monthly gross profit, and CAC payback from ARPU, margin, churn, and acquisition cost.
Are the results guaranteed?
No. Results are deterministic estimates from the values and assumptions you enter.
How should I use the result?
Use it for planning and scenario comparison, then verify current rates, costs, accounting definitions, and professional requirements that apply to your situation.
Is entered data uploaded?
No. The calculation runs in your browser.
Use with
These tools support a practical next or previous step in the same workflow.
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