Customer Lifetime Value Calculator

What is customer lifetime value?

A customer lifetime value calculator estimates the gross profit you can expect from a customer over the full time they buy from your business. Customer lifetime value is often shortened to LTV or CLV. This calculator uses order value, purchase frequency, gross margin, and customer lifespan to estimate that value.

The formula is lifetime value = average order value × purchases per year × gross margin × lifespan. When churn is measured, the calculator estimates lifespan as 1 divided by the churn rate. The result is gross profit, not total sales revenue, because the formula accounts for the cost of delivering what you sell.

Why customer lifetime value matters

LTV gives you a way to compare the value of a customer with the cost of attracting one. The LTV to CAC ratio divides lifetime value by customer acquisition cost. CAC includes the marketing and sales costs you assign to winning a customer. A ratio above 1 : 1 means the estimated gross profit exceeds that acquisition cost, before other business expenses.

That comparison can inform decisions about pricing, advertising, sales staffing, and customer service. If customers generate enough gross profit over time, you may be able to spend more to acquire them or invest more in keeping them. If the ratio is weak, examine your margin, retention, and acquisition costs before increasing your budget. The result is a planning estimate, not a guarantee of future cash flow or profit.

How to use this LTV calculator

1. Enter your average order value and the number of purchases a customer makes per year. Use figures that describe the customer group you want to analyze.
2. Enter your gross margin as a percentage. Use the margin after the direct costs of making or providing the product or service, rather than your markup.
3. Choose whether churn is measured yearly or over another period, then enter the churn rate for that period. Match the churn period to the calculator’s selected measurement.
4. Enter the lifespan assumption for a customer when churn does not provide a usable estimate. With a churn rate available, the formula estimates lifespan as 1 divided by churn.
5. Enter customer acquisition cost. Include the sales and marketing costs you count as part of acquiring a customer, and use a definition that stays consistent across comparisons.
6. Review the estimated customer lifespan, lifetime gross profit, and LTV to CAC ratio. Change one input at a time to see which assumption has the greatest effect.

Customer lifetime value calculator example

How to read your LTV results

The lifetime value result is an estimate of gross profit per customer over the estimated lifespan. In the example, $587 is the estimated gross profit and $90 is the acquisition cost. The 6.5 : 1 ratio means the estimated lifetime gross profit is 6.5 times the acquisition cost.

Do not treat a higher ratio as automatically better. A high result may reflect strong retention or margin, but it may also depend on optimistic assumptions or limited investment in customer acquisition. A lower result can point to a need to review costs, pricing, or customer experience. Compare results for similar customer groups and against your own past results or reliable industry data, rather than treating one ratio as a universal target.

How to improve customer lifetime value

1. 01

   Increase useful repeat purchases

   Make it easier for customers to buy again with timely replenishment reminders, clear reorder options, or service plans that fit how they use your product. Track whether these changes lead to repeat purchases without relying on heavy discounts.

2. 02

   Protect gross margin

   Review product costs, delivery expenses, and discounting. Consider renegotiating supplier terms, adjusting a product bundle, or raising prices where customers see a clear reason to pay more. Check the effect on both margin and repeat buying.

3. 03

   Reduce avoidable churn

   Ask departing customers why they leave, fix recurring service problems, and make onboarding clearer. Focus retention work on the customers and issues that matter most to your business, then update the churn input when your measured results change.

4. 04

   Spend acquisition money with care

   Compare acquisition cost and LTV across channels or customer groups. Consider shifting budget away from campaigns that bring in customers who rarely return. Do not cut spending solely to raise the ratio if it also limits profitable growth.

Common LTV calculator mistakes

• Using revenue instead of gross margin

  The formula estimates gross profit, so entering sales revenue as if it were margin overstates customer value. Use gross margin after direct product or service costs.

• Mixing churn periods

  A yearly churn rate and a rate measured over a shorter period do not mean the same thing. Select the matching period and use a consistent method when comparing results.

• Combining unlike customers

  Customers from different products, channels, or plans may have different order values, margins, and retention. A blended result can hide those differences. Calculate separate estimates where the underlying behavior differs.

• Treating the estimate as a promise

  LTV depends on assumptions about future buying and churn. Use it to compare scenarios and support decisions, then check those assumptions against actual customer behavior.

The lifetime value formula

Key terms

Customer lifetime value (LTV or CLV)

An estimate of the gross profit a customer generates over the customer relationship.

Customer acquisition cost (CAC)

The sales and marketing cost assigned to acquiring a customer.

Gross margin

The share of sales left after direct costs of making or providing the product or service.

Churn rate

The share of customers who stop buying or leave during a stated period.

LTV to CAC ratio

Lifetime value divided by customer acquisition cost, shown as a comparison between estimated customer gross profit and acquisition cost.