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LTV to CAC Ratio Calculator

Calculate your LTV:CAC ratio and benchmark against the ideal 3:1 threshold for sustainable growth.

Category
Sales Calculators
Type
Calculator
Price
Free, no signup

LTV to CAC Ratio Calculator

Calculate LTV:CAC Ratio

Average Revenue Per User (ARPU)

$

Monthly revenue per customer

Customer Acquisition Cost (CAC)

$

Sales + marketing per customer

Gross Margin (%)

%

Typically 80%+ for SaaS

Monthly Churn Rate (%)

%

Used to calculate customer lifetime

📊 Key Formulas

LTV = ARPU × Gross Margin % × Customer Lifetime

LTV:CAC Ratio = LTV ÷ CAC

Payback Period = CAC ÷ (ARPU × Gross Margin %)

Testing this tool with an AI agent
  • Open this page in a browser. LTV to CAC Ratio Calculator is the form at the top of the page.
  • Fill every field with sample values. Use made-up data, never real customer data.
  • Press the main button and wait for the result to show on the page.
  • No login, API key or install is needed.

What it does

  • Ratio calculation
  • Payback period
  • Unit economics
  • Benchmarking
  • Improvement scenarios

When to use it

  • Unit economics analysis
  • Investor reporting
  • Growth planning
  • Budget optimization

About LTV to CAC Ratio Calculator

The LTV:CAC Ratio Calculator calculates the critical ratio of customer lifetime value to acquisition cost. Benchmark against the 3:1 ideal for sustainable growth.

Frequently asked questions

How does LTV to CAC Ratio Calculator work?

Fill in the form at the top of this page and run it. The result shows on the same page. No account or install needed.

Is LTV to CAC Ratio Calculator free?

Yes. It is free and needs no signup. Use it as often as you like.

How much should I trust the result?

Use it as a quick check. It follows common sales calculators rules, so check anything important again before you change live settings.

Can I use it for work?

Yes. You can use it for personal and work tasks.

Should I paste private data into it?

No. Like any online tool, never paste passwords, API keys or private customer data.

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Install with AI

Your coding agent sets up the FirstSales CLI and skills for you.

Prompt for Claude Code

I'm setting up FirstSales (https://firstsales.io), an AI outbound sales platform: campaigns, contacts, a reply inbox, deliverability and lead signals. Help me get my workspace sending real, good emails end to end, from Claude Code.

Read these first so you know how FirstSales works:
- Developer docs and API: https://developer.firstsales.io
- CLI: https://www.npmjs.com/package/@firstsales.io/cli
- Skills for coding agents: https://github.com/firstsalesio/firstsales-skills (read README.md and GUIDE.md)

Setup
1. Install the CLI: npm install -g @firstsales.io/cli
2. Install the FirstSales skills:
   claude plugin marketplace add firstsalesio/firstsales-skills
   claude plugin install firstsales@firstsales
3. Ask me if I already have a FirstSales account. If not, send me to https://app.firstsales.io to sign up.
4. Ask me to create an API key under Settings → API → API Keys, with only the scopes we need.
   Never ask me to paste the key into this chat. Tell me to run this in my own terminal, so the key stays hidden:
   read -rs FS_KEY && firstsales auth login --api-key "$FS_KEY"; unset FS_KEY
5. Run `firstsales whoami` and tell me which workspace and organisation we are connected to.

Then ask me about my business: what I sell, who I sell to (roles, company size, countries), my best customers, and what I use today for outbound (tools, lists, mailboxes). Walk me through:
1. Teaching FirstSales my business: website, offer, proof points and case studies in the knowledge base, so the AI writes like someone who knows the product.
2. Connecting my sending mailboxes and checking my sending domain: SPF, DKIM, DMARC and warm-up. If anything is unhealthy, tell me the exact DNS record to add.
3. Bringing in contacts: import my CSV or CRM export into a clean list, remove duplicates and bad emails, and block domains I must never email (customers, competitors, my own).
4. Building my first campaign: the right list, senders, steps and timing. Write the sequence with me, show me the drafts, and do not launch until I say yes.
5. Setting up Signals if it fits: find people engaging with LinkedIn posts about topics my buyers care about, and turn them into leads.
6. Inviting my team and giving each person the right access.

Once campaigns run, show me how to work the reply inbox from here: which replies need an answer, draft responses in my voice, and move good conversations into deals. If I use Cal.com, connect it so follow-ups can offer my booking link (not the first email).

Throughout, as you learn about my business, proactively suggest and help create:
- Reply templates for the questions and objections my prospects are likely to raise, based on my product, site and codebase if you can see them.
- Campaign ideas and segments worth testing, with the reason for each.

Safety rules:
- Show every change as a dry run (--dry-run) first and wait for my yes. Never send emails, launch campaigns or delete anything without my yes.
- Tell me before anything that spends credits, and how many.

Be opinionated. If the docs give a sensible default, just use it. Don't make me choose between five options.
Developer docs ↗npm: @firstsales.io/cli ↗GitHub: firstsales-skills ↗