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Both calculators run independently — change the inputs on either side to compare results.

Rule of 40 Calculator

Check whether a SaaS company's growth rate plus profit margin clears the 40% benchmark that signals a healthy balance of growth and profitability.

Revenue Growth Rate (%)

Profit Margin (%)

Business

Customer Acquisition Cost (CAC) Calculator

Calculate how much it costs to acquire one new customer by dividing total sales and marketing spend by new customers gained. The denominator of the all-important CLV:CAC ratio.

Total Marketing Spend ($)

Sales Expenses ($)

New Customers Acquired (customers)

Key differences

	Rule of 40 Calculator	Customer Acquisition Cost (CAC) Calculator
Category	Business	Business
Inputs required	2	3
Result	Rule of 40 Score (%)	Customer Acquisition Cost ($)
What it does	Check whether a SaaS company's growth rate plus profit margin clears the 40% benchmark that signals a healthy balance of growth and profitability.	Calculate how much it costs to acquire one new customer by dividing total sales and marketing spend by new customers gained. The denominator of the all-important CLV:CAC ratio.