SaaS LTV to CAC Calculator
Work out customer lifetime value, your LTV to CAC ratio and CAC payback from four numbers, then share it as a live calculator.
- Free
- No sign-up to try
- Works as you type
SaaS LTV to CAC
Customer lifetime value
$3,744
LTV : CAC
2.5x
Months to pay back CAC
16.0 mo
- Lifetime value = revenue per account × gross margin ÷ monthly churn.
- LTV : CAC = lifetime value ÷ cost to acquire a customer.
- Payback = cost to acquire ÷ monthly gross profit per account.
Free, no sign-up to try. Save it as a live calculator you can share; an estimate from the numbers you enter, not financial advice. Check the result against your own records before you rely on it.
How it works
How the SaaS LTV to CAC Calculator works
- 1
Enter your numbers
Every result updates as you type, with the formula shown under it.
- 2
Check the method
See how each number is worked out and what it assumes.
- 3
Save it as a Room
Share a live calculator: others can change the numbers and see the result update.
Worked example
What it makes
Example inputs
- Revenue per account per month
- $120
- Gross margin
- 78 %
- Monthly churn
- 2.5 %
- Cost to acquire a customer
- $1,500
Results
- Customer lifetime value
- $3,744
- LTV : CAC
- 2.5x
- Months to pay back CAC
- 16.0 mo
How it's calculated
- Lifetime value = revenue per account × gross margin ÷ monthly churn.
- LTV : CAC = lifetime value ÷ cost to acquire a customer.
- Payback = cost to acquire ÷ monthly gross profit per account.
- Assumes: Churn stays at the same monthly rate (the average customer stays 1 ÷ churn months).
- Assumes: Expansion revenue and discounting are not included.
An estimate from the numbers you enter, not financial advice. Check the result against your own records before you rely on it.
Who it's for
Who uses it
Founders
Check unit economics before a fundraise or a pricing change.
Finance and RevOps
Share one calculator the team can test scenarios in.
Investors
Sanity-check a company's numbers with their inputs.
Good to know
What to consider
- Lifetime is estimated as 1 ÷ monthly churn, so small changes in churn move LTV a lot.
- Use gross margin, not revenue, or LTV will be overstated.
Questions
About the SaaS LTV to CAC Calculator
What is a good LTV to CAC ratio?
Many SaaS operators aim for about 3:1 or better, but the right target depends on your growth stage, cash position and payback period. Treat any benchmark as a starting point.
Can I share the calculator with my team or a client?
Yes. The Room keeps the calculator live: anyone with the link can change the numbers and see the result update, with the method and assumptions on the same page.
Make your calculator now
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