How to calculate Meta ROAS without confusing it with profit

Use purchase value and spend to calculate platform ROAS, then read it beside CPA, attribution, and commercial costs.

The platform ROAS formula

Platform ROAS equals purchase value divided by ad spend for the same evidence window and currency. Keep the source and attribution window visible beside the answer.

If spend is zero or purchase value is missing, ROAS is unavailable. Showing zero would invent evidence that does not exist.

A hypothetical purchase example

Hypothetical example: a seven-day review shows USD 60 in spend and USD 240 in attributed purchase value. Platform ROAS is 240 / 60 = 4.00. Two purchases would also produce a USD 30 CPA.

That 4.00 is not profit. Margin, refunds, discounts, shipping, tax, repeat purchases, and attribution can all change the commercial interpretation.

Use ROAS as one evidence line

Read platform ROAS beside CPA, outcome count, budget pace, and measurement quality. A supplied ROAS floor can be a planning boundary, but it is not a Meta-certified threshold or a customer benchmark.