Citable benchmarks
Average ecommerce conversion rate is often ~2–3% (varies widely by industry and traffic mix).
Source: IRP Commerce — Ecommerce Market Data (Jan 2026)
Average ecommerce cart abandonment rate is 70.19%.
Source: Baymard Institute — Cart Abandonment Rate Statistics (2024)
Key takeaways
- Amazon Calculator — Seller ROI & FBA Unit Economics — 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.
Amazon profitability in one place
Amazon sellers need both ROI framing (ads or overall profit) and unit economics after FBA and referral fees. Pick a tab below.
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For general margin work see Profit Margin Calculator and ROAS Calculator.
Frequently asked questions
FBA vs seller ROI — which tab?
Use Seller ROI for profit-based ROI after costs. Use FBA unit economics for per-unit fees, referral, and COGS on a single SKU.
Is this Amazon calculator free?
Yes. Free with no signup.