Free calculator

ROAS calculator

Enter ad spend and attributed revenue to get Return on Ad Spend as a multiple and a percentage — then compare it to your break-even floor.

How ROAS is calculated

ROAS = attributed revenue ÷ ad spend. A ROAS of 4.0× means you generated $4 in revenue for every $1 spent on ads. Platforms often show the same idea as a percentage (400%).

ROAS ignores cost of goods. Pair it with POAS or contribution margin so high-revenue campaigns do not hide thin-margin losses.

ROAS = revenue ÷ ad spend
ROAS % = (revenue ÷ ad spend) × 100
Break-even ROAS depends on margin — use the break-even tool for floors.

When ROAS misleads

Two campaigns at 5× ROAS can have opposite profit outcomes if margins differ. Use ROAS for auction diagnostics, then judge scale with POAS and product-level profit uploads.

Frequently asked questions

What is ROAS?

Return on Ad Spend measures revenue generated per dollar of ad spend. Formula: revenue ÷ ad spend. It is a revenue efficiency metric, not a profit metric.

How do you calculate ROAS?

Divide attributed revenue by ad spend for the same window. Example: $20,000 revenue and $5,000 spend → ROAS = 4.0× (or 400%).

What is a good ROAS?

It depends on margin. At 25% margin, break-even ROAS is 4×; many brands target higher. Always compare ROAS to your break-even floor, not a generic industry number.