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Customer & Lead Acquisition Cost Calculator

Compare three acquisition cost ratios without treating leads, conversions and customers as interchangeable outcomes.

CalculateUnderstandDecide

CALCULATE

Enter your assumptions.

Nothing entered here is saved or sent to OpenSkool.

Symbol only. This tool does not convert currencies.

Your assumptions

Optional. Use your defined lead count for the same period and scope.

Optional. Use the conversion event your CPA definition is based on.

Optional. Use actual new customers attributed to the relevant spend.

UNDERSTAND THE RESULT

Your result will appear here.

Enter the assumptions you want to examine, then calculate. We will show the result, the arithmetic and its limits.

HOW WE CALCULATED THIS

The formula stays visible.

Each result uses only the values you enter. The calculator does not add hidden assumptions.

CPL
Relevant spend ÷ leads
CPA
Relevant spend ÷ conversions
CAC
Relevant acquisition spend ÷ new customers

UNDERSTAND BEFORE YOU DECIDE

What the number can—and cannot—tell you.

01

CPL measures a lead outcome

A lead is an expression of interest under your definition. It is not automatically a sale or customer.

02

CPA depends on the action

Name the conversion action behind CPA. A signup, booked call and purchase represent different outcomes.

03

CAC needs the relevant acquisition scope

A useful CAC calculation aligns spend and acquired customers across the same period, channels and cost definition.

These ratios depend on your definitions, attribution and supplied counts. They do not by themselves establish profitability.

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