Enter ad metrics
Use attributed revenue for channel-specific optimization.
| ROAS | |
| ACOS | |
| Break-even ACOS | |
| Break-even ROAS | |
| Status |
Ecommerce Toolkit
ACOS and ROAS Calculator
Measure ad efficiency and compare campaign ACOS with your break-even level based on target margin.
ACOS and ROAS planning guide for ecommerce ads
ACOS and ROAS are core ad efficiency metrics for marketplaces and D2C channels. This calculator helps you quickly evaluate whether campaign spend is aligned with expected contribution margin by comparing actual ACOS with break-even thresholds.
Higher ROAS is generally better, but target levels should be based on unit economics and business goals. Use this page for campaign reviews, bid updates, and budget reallocation decisions across products and ad groups.
- Track ACOS trend over time, not single-day spikes.
- Use break-even ACOS as a floor for profitability checks.
- Combine this with margin and settlement calculators for full funnel analysis.
ACOS & ROAS FAQ
What is a good ACOS for ecommerce ads?
A good ACOS depends on your profit margin. As long as ACOS stays at or below your margin percentage, the campaign is profitable.
How is ROAS different from ACOS?
ROAS is the inverse of ACOS expressed as a ratio. A 25% ACOS equals a 4x ROAS. Both measure ad efficiency from different perspectives.
Should I optimize for ACOS or ROAS?
Both represent the same relationship. Amazon Ads uses ACOS, while Google and Meta use ROAS. Pick the metric your platform reports.