Citable benchmarks
Average ecommerce cart abandonment rate is 70.19%.
Source: Baymard Institute — Cart Abandonment Rate Statistics (2024)
Average ecommerce conversion rate is often ~2–3% (varies widely by industry and traffic mix).
Source: IRP Commerce — Ecommerce Market Data (Jan 2026)
Key takeaways
- Free ROI Calculator — Calculate Marketing ROI & Ad Spend for Your Ecommerce — focus on one metric or lever at a time; validate with data before scaling spend.
- Pair reading with free Growthegy calculators (LTV, ROAS, break-even, pricing) to turn ideas into numbers.
- Bookmark growthegy.com/tools/ and run the Business Strategy Quiz when you need a prioritised roadmap.
What is marketing ROI?
Marketing ROI (return on investment) is the profit you make from marketing spend, expressed as a percentage. Formula: ROI % = (Profit ÷ Ad spend) × 100, where Profit = Revenue − Ad spend. Why it matters: It shows whether your ads or campaigns are profitable. Use the calculator below to get your numbers.
Knowing your return on ad spend helps you scale what works and cut what doesn’t. Use this free ROI calculator to enter ad spend (or total marketing spend), number of conversions, and average order value—you get revenue, profit, and ROI %.
ROI Calculator
Enter your ad spend (or total marketing spend), number of conversions, and average order value. We will calculate revenue, profit, and ROI %.
Revenue: $3,000
Profit: $2,000
ROI: 200.0%
How to use your ROI results
If ROI is positive, you’re earning more than you spend; use that to set budgets and compare channels. If it’s negative, focus on improving conversion rate, AOV, or lowering cost per acquisition. For more profitability tools and a full cost growth tool set, see our LTV Calculator, Product Profitability Analyzer, and tools hub.