Free Startup Tool
Free CAC:LTV Ratio Calculator
Turn your acquisition spend, ARPU, margin, and churn into your CAC, LTV, and LTV:CAC ratio — instantly. No signup.
Turn your acquisition spend, ARPU, margin, and churn into your CAC, LTV, and LTV:CAC ratio — instantly. No signup.
Total sales & marketing spend and how many customers it bought you.
e.g. $10,000 spend → 50 customers
Monthly revenue per customer, gross margin, and monthly churn rate.
e.g. $49/mo, 80% margin, 3% churn
Your CAC, LTV, LTV:CAC ratio, and CAC payback period — instantly.
e.g. CAC $200 · LTV $1,306 · 6.5:1
CAC (Customer Acquisition Cost) is your total sales & marketing spend divided by the number of new customers it acquired over the same period.
LTV (Customer Lifetime Value) is your average monthly revenue per customer, multiplied by your gross margin, multiplied by the customer's expected lifetime in months (1 divided by your monthly churn rate).
Most investors consider 3:1 or higher healthy for a SaaS business. Above 5:1 can mean you're under-investing in growth, while below 1:1 means you're losing money on every customer you acquire.
It's how many months it takes for a customer's gross-margin-adjusted revenue to cover their acquisition cost. Most SaaS companies target a payback period under 12 months.
Yes — calculating your CAC, LTV, ratio, and payback period is completely free with no signup required.
A strong LTV:CAC ratio only holds up if the underlying demand is real. Our free Idea Validator checks your idea against actual complaints from Reddit, Hacker News, and Indie Hackers so you're not scaling spend against a problem nobody has.