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Free Amazon FBA Calculator

Estimate Amazon FBA referral, fulfillment, and storage fees, then see net profit per unit, margin, ROI, break-even price, and whether the product is worth selling.

  • 100% free
  • No signup
  • Runs in your browser
Net profit per unit
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Net margin
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ROI
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Break-even price
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Monthly profit
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Price breakdown

Amazon fees change periodically. These calculations use fee rates current as of 2024. Always verify with Amazon Seller Central before making inventory decisions.

Guide

What is Amazon FBA?

Fulfillment by Amazon (FBA) is a service where you send inventory to Amazon's warehouses and Amazon handles storage, packing, shipping, and customer service for your orders. In return, Amazon charges fees that come out of every sale. This calculator estimates those fees and shows your net profit per unit so you can decide whether a product is worth selling before you commit inventory.

The main FBA fees

  • Referral fee: Amazon's commission on each sale, usually around 8% to 15% of the selling price depending on category (15% is the most common).
  • Fulfillment fee: a per-unit charge for picking, packing, and shipping, based mainly on the item's size and weight.
  • Storage fee: a monthly charge for the warehouse space your inventory occupies, higher in the busy fourth quarter.

How to calculate FBA profit

Net profit per unit is your selling price minus the cost of the product, minus all Amazon fees, minus inbound shipping to Amazon. The calculator above adds it up for you and also shows your margin, ROI, break-even price, and a simple verdict. Watching the break-even figure is key, because it tells you the lowest price you can accept before a sale starts losing money.

What is a good FBA margin?

Many sellers aim for a net margin around 15% to 30% and an ROI of 50% or more on product cost, to leave room for advertising, returns, and price competition. Thin margins are fragile: a small fee increase or a price war can wipe them out. Use conservative numbers so a product still works when conditions are less than ideal.

Fee estimates are approximate; check current rates in Seller Central. This tool is for general guidance, not financial advice.

Last updated: July 2026

Frequently Asked Questions

What is Amazon FBA?
Amazon FBA (Fulfillment by Amazon) is a service where sellers send inventory to Amazon warehouses and Amazon handles storage, packing, shipping, and customer service. Sellers pay fees for these services.
What fees does Amazon charge for FBA?
Amazon charges a referral fee (percentage of selling price, varies by category), a fulfillment fee (based on product size and weight), and monthly storage fees (based on cubic feet used).
What is a good profit margin for Amazon FBA?
Most experienced FBA sellers target at least 25–30% net margin and 50%+ ROI on cost. Margins below 15% leave little room for advertising costs and market fluctuations.
What is the Amazon referral fee?
The referral fee is Amazon’s commission on each sale, typically 8–17% depending on category. Electronics and personal care are 8%. Clothing, toys, and most general merchandise are 15%.
How do I calculate FBA profit?
Start with your selling price, then subtract referral fee, fulfillment fee, storage fee, product cost, and advertising spend. What remains is your net profit per unit.