Compare calculators

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

Marketing ROI Calculator

Calculate marketing ROI as the percentage return generated by marketing spend over the cost of that spend. Use it for executive-level marketing performance reporting, channel allocation decisions, and justifying marketing budget against business outcomes.

Revenue from Marketing ($)

Marketing Investment ($)

Fill in the required fields to see your result.

Ecommerce

Cost Per Acquisition Calculator

Calculate cost per acquisition (CPA) by dividing marketing spend by the number of new customers (or conversions) acquired. Use it as a primary efficiency metric for paid acquisition channels and a key input for sizing acquisition budgets against customer lifetime value.

Marketing Spend ($)

New Customers Acquired

Fill in the required fields to see your result.

Key differences

	Marketing ROI Calculator	Cost Per Acquisition Calculator
Category	Marketing	Ecommerce
Inputs required	2	2
Result	Marketing ROI (%)	Cost Per Acquisition ($)
What it does	Calculate marketing ROI as the percentage return generated by marketing spend over the cost of that spend. Use it for executive-level marketing performance reporting, channel allocation decisions, and justifying marketing budget against business outcomes.	Calculate cost per acquisition (CPA) by dividing marketing spend by the number of new customers (or conversions) acquired. Use it as a primary efficiency metric for paid acquisition channels and a key input for sizing acquisition budgets against customer lifetime value.