Amazon FBA Calculator
Calculate your Amazon FBA profit, margin, ROI, and all fees including referral, fulfillment, and storage costs.
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How to use this calculator
- 1
Enter your target selling price on Amazon.
- 2
Input your product cost (what you pay the supplier) and shipping cost to Amazon's warehouse.
- 3
Select your product category to apply the correct referral fee rate.
- 4
Choose your package size tier to estimate fulfillment fees.
- 5
Add PPC advertising cost per unit if you run Sponsored Products ads.
Frequently asked questions
What is a good profit margin for Amazon FBA?
Most experienced FBA sellers target a minimum net margin of 25–30% after all fees. A margin below 20% leaves little room for PPC costs, returns, or price competition. ROI on cost should ideally be 100%+ — meaning you double your investment.
What is the Amazon referral fee?
The referral fee is a percentage of the selling price Amazon charges for each sale. It ranges from 6% (automotive) to 20% (jewelry). Most general merchandise categories are 15%. It's the largest fee for most sellers.
What are FBA fulfillment fees?
FBA fulfillment fees are charged per unit sold and cover picking, packing, shipping, and customer service. They depend on the product's weight and size tier. Small standard items (under 12oz) start around $3.22. Oversized items can cost $10–$20+ per unit.
Should I use FBA or FBM (Fulfilled by Merchant)?
FBA is better if your product is small, lightweight, has high velocity, and benefits from Prime badge (which dramatically increases conversion). FBM is better for large/heavy items where FBA fees eat into margins, very slow-moving items (high storage fees), or products needing special handling.
Free Amazon FBA Profit Calculator
Amazon FBA fee structure explained
Amazon FBA sellers pay four main types of fees: (1) Referral fee — a percentage of the sale price (varies by category, typically 15%). (2) FBA fulfillment fee — per-unit fee for pick, pack, ship (based on size/weight). (3) Monthly inventory storage fee — per cubic foot stored in Amazon warehouses ($0.78/cu ft Jan–Sep, $2.40/cu ft Oct–Dec). (4) Optional: long-term storage fees for inventory unsold after 365 days.
How to improve your FBA profit margin
Five levers to increase FBA profitability: (1) Negotiate lower COGS with suppliers — every $1 saved per unit goes straight to profit. (2) Optimise packaging to reduce size tier and fulfillment fees. (3) Improve listing conversion rate — higher BSR means lower PPC costs. (4) Bundle products to increase average order value while reducing per-item fees. (5) Use Amazon's fee estimator before finalising product selection — fees can make or break a product.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →