LTV to CAC Ratio Calculator
Last updated: October 15, 2026
Calculate customer lifetime value, acquisition cost ratio, gross-margin payback period and maximum CAC for a target ratio.
Estimated LTV to CAC ratio
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- Estimated gross-margin customer LTV: —
- Gross-margin CAC payback period: —
- Maximum CAC at target ratio: —
- Gross profit per customer per month: —
On this page
Quick summary: Calculate customer lifetime value, acquisition cost ratio, gross-margin payback period and maximum CAC for a target ratio.
Read the complete guide
Updated reference sections in this guide are in English.
What this calculator estimates
Calculate customer lifetime value, acquisition cost ratio, gross-margin payback period and maximum CAC for a target ratio.
How to use it
Enter Monthly revenue per customer ($); Gross margin (%); Monthly customer churn (%); Customer acquisition cost ($); Target LTV to CAC ratio. Select Calculate to update the results.
How the calculation works
Gross profit per customer is monthly revenue multiplied by gross margin. A simple churn-based lifetime value divides monthly gross profit by monthly churn, then compares LTV with CAC.
Worked example: starting scenario
| Monthly revenue per customer ($) | 250 |
|---|---|
| Gross margin (%) | 80 |
| Monthly customer churn (%) | 3 |
| Customer acquisition cost ($) | 1800 |
| Target LTV to CAC ratio | 3 |
| Estimated LTV to CAC ratio | 3.7× |
|---|---|
| Estimated gross-margin customer LTV | $6,666.67 |
| Gross-margin CAC payback period | 9 months |
| Maximum CAC at target ratio | $2,222.22 |
| Gross profit per customer per month | $200.00 |
Important limitations
This simplified formula assumes stable churn and margin. Cohort retention, expansion, discounting, onboarding, support costs and channel mix can change true unit economics.