ROAS calculator
ROAS is just ACoS flipped upside down: ROAS = ad revenue ÷ ad spend = 100 ÷ ACoS. A 25% ACoS is a 4× ROAS; a 50% ACoS is 2×. The main calculator shows both, because each is useful in different rooms: ACoS inside seller-central reports, ROAS in team conversations.
Quick reference
| ACoS | ROAS | $1 of ads returns |
|---|---|---|
| 10% | 10× | $10.00 |
| 15% | 6.67× | $6.67 |
| 20% | 5× | $5.00 |
| 25% | 4× | $4.00 |
| 30% | 3.33× | $3.33 |
| 40% | 2.5× | $2.50 |
| 50% | 2× | $2.00 |
Break-even ROAS
The break-even line works the same way: break-even ROAS = 100 ÷ break-even ACoS. With a 27% break-even ACoS, your break-even ROAS is 3.7× — ads returning less than $3.70 per dollar are consuming product margin. The calculator computes it from your real per-unit costs, and the same numbers drive the ACoS view — pick whichever your team speaks.