ROI and ROAS are two of the most commonly confused marketing metrics. Both measure returns, but they answer different questions and use different inputs.
ROI (Return on Investment)
**Formula**: ((Revenue - Total Cost) / Total Cost) × 100
ROI considers **all costs** — ad spend, production, shipping, overhead — and compares them to **profit** (not revenue). It tells you whether an investment was worthwhile overall.
Example: You spend $1,000 on ads, $500 on product costs, and generate $3,000 in revenue. - Total cost: $1,500 - Profit: $3,000 - $1,500 = $1,500 - ROI: ($1,500 / $1,500) × 100 = 100%
ROAS (Return on Ad Spend)
**Formula**: Revenue from Ads / Ad Spend
ROAS only considers **ad spend** and compares it to **revenue** (not profit). It tells you how efficiently your advertising dollars generate sales.
Example: You spend $1,000 on ads and generate $3,000 in revenue. - ROAS: $3,000 / $1,000 = 3:1 (or 300%)
The Key Differences
When to Use Each
- **Use ROAS** for ad campaign optimization — comparing channels, ad sets, and keywords
- **Use ROI** for overall business decisions — evaluating product lines, marketing budgets, and investments
Common Pitfall
A campaign with 4:1 ROAS might still lose money if product costs, shipping, and overhead exceed the remaining revenue. Always check ROI for profitability, not just ROAS for efficiency.
Calculate your returns with our ROI Calculator and ROAS Calculator.