ROAS (return on ad spend)

ROAS, or return on ad spend, measures how much revenue your advertising generates for each unit of currency you spend on it. It is usually shown as a ratio (such as 3.0) or a multiple (3x), and it is one of the most common ways ecommerce brands judge whether a campaign, ad set or individual ad is pulling its weight.

How to calculate it

ROAS = revenue attributed to ads ÷ ad spend

Worked example (made-up numbers): you spend $1,000 on a Meta campaign and Ads Manager attributes $4,000 in purchases to it. Your ROAS is 4,000 ÷ 1,000 = 4.0, meaning every $1 of spend returned $4 in tracked revenue. You can run your own numbers with the ROAS calculator.

Why it matters

ROAS is a revenue metric, not a profit metric. A 4.0 ROAS can be very profitable for a brand with high margins and loss-making for one with thin margins, which is why it should always be read alongside your break-even ROAS and contribution margin. Keep in mind:

• Platform-reported ROAS depends on the attribution window and tracking quality, so it rarely matches your store's numbers exactly.
• Retargeting often shows a higher ROAS than prospecting because it reaches people who were already likely to buy.
• Many brands pair ad-level ROAS with MER to see the blended picture across all channels.