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LTV to CAC Ratio Calculator

Estimate your LTV to CAC ratio using average revenue, gross margin, customer lifespan, and acquisition cost.

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Overview

This LTV to CAC Ratio Calculator helps you estimate how efficiently your business turns acquisition spend into customer value. Enter your average revenue per customer, gross margin, customer lifespan, and customer acquisition cost to see your lifetime value and LTV to CAC ratio.

How it works

The calculator first converts revenue to a monthly estimate when needed, then multiplies it by the average customer lifespan to estimate lifetime revenue. It applies gross margin to that lifetime revenue to estimate customer lifetime value (LTV). Finally, it divides LTV by customer acquisition cost (CAC) to produce the LTV to CAC ratio. A higher ratio generally suggests stronger acquisition efficiency, but the right target depends on your business model, retention, payback timing, and growth strategy.

How to use this calculator

  1. 1Enter the average revenue generated by one customer.
  2. 2Select whether that revenue is monthly or annual.
  3. 3Add your gross margin percentage.
  4. 4Enter the average customer lifespan in months.
  5. 5Enter your average customer acquisition cost and review the ratio.

Example Calculation

Average Revenue per Customer

$150

Gross Margin

80%

Customer Lifespan

30

Revenue Period

monthly

Customer Acquisition Cost

$600

LTV to CAC Ratio

0.00 :1

If a customer generates 150 per month, stays for 30 months, and your gross margin is 80%, the estimated LTV is 3600. With a CAC of 600, the LTV to CAC ratio is 6.00:1 and the net value after CAC is 3000.

Frequently asked questions

What does the LTV to CAC ratio show?

It shows how much estimated lifetime value you earn for each unit of customer acquisition cost. It is often used to assess marketing and sales efficiency.

What is a good LTV to CAC ratio?

Many businesses look for a ratio above 3:1, but the right benchmark depends on margins, retention, growth stage, and cash flow needs.

Should LTV be based on revenue or gross profit?

LTV is often more useful when adjusted for gross margin because it reflects value after direct delivery costs rather than top-line revenue alone.

Why does customer lifespan matter so much?

A longer average lifespan increases lifetime revenue, which can materially raise LTV and the resulting ratio.

Can I use annual revenue instead of monthly revenue?

Yes. If you choose annual revenue, the calculator converts it to a monthly estimate so it can be used with lifespan entered in months.

Does this include overhead or operating expenses?

No. This version focuses on gross-margin-based lifetime value and customer acquisition cost, not full business profitability.

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Assumptions and warnings

Assumptions

  • The calculation assumes your average revenue and customer lifespan are representative of a typical customer.
  • Gross margin is applied to lifetime revenue to estimate contribution before overheads and other indirect costs.
  • Customer acquisition cost is treated as an average blended cost per acquired customer.
  • Results are estimates and do not include financing costs, taxes, refunds, or changes in retention over time.

Warnings

  • This calculator provides an estimate only and is not business or financial advice.
  • Use consistent revenue and cost assumptions, especially when comparing periods or channels.