Support: Amazon FBA Calculator

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Common questions

How much does Amazon take from an FBA sale?

Two main fees. The referral fee is a percentage of the selling price set by the category: 15% for most, with a $0.30 minimum. The FBA fulfillment fee is a fixed amount for the package's size tier and weight, which for a standard-size item sold between $10 and $50 runs from $3.32 for a very small, light item to $6.67 at 3 lb, before a 3.5% fuel and logistics surcharge. Storage is charged on top by the cubic foot. The rates are in Amazon's 2026 FBA fulfillment fee rate card and its referral fee table, and this calculator shows the date they were last checked.

How does Amazon decide the size tier?

From the packaged product's longest, middle and shortest sides and its weight. Small standard-size is 16 oz or less and no more than 15 by 12 by 0.75 inches. Large standard-size is up to 20 lb and 18 by 14 by 8 inches. Beyond that come Small Bulky, Large Bulky and Extra-Large, which also look at the length plus the girth. The definitions are on Amazon's product size tiers page. Type the measurements and the calculator names the tier.

What is dimensional weight, and when does Amazon use it?

Dimensional weight is the package's length times its width times its height in inches, divided by 139. For every size tier except Small standard-size and items over 150 lb, Amazon charges for whichever is greater, the dimensional weight or the weight on the scales. For bulky and extra-large items it treats the width and height as at least 2 inches. See Amazon's dimensional weight page. The calculator tells you which weight is being charged, so you can see when a smaller box would cut the fee.

Why does the FBA fee change at $10 and $50?

Amazon has three columns on its rate card. Items priced under $10 get its Low-Price FBA rates, which are lower. Items from $10 to $50 pay the standard rate, and standard-size items over $50 pay a little more. So an item at $9.99 can leave you more than the same item at $10.50. The break-even and target prices in this calculator allow for that.

What is the fuel and logistics surcharge?

A 3.5% surcharge Amazon has added to FBA fulfillment fees in the United States since 17 April 2026. It is worked out on the fulfillment fee, not on the selling price, and the calculator shows it on its own line.

When do holiday peak FBA fees apply?

From 15 October 2026 to 14 January 2027, Amazon uses a dearer fulfillment rate card, and the surcharge applies to those rates too. Storage is also dearer from October to December. The calculator switches to the peak rates by itself during those dates, and you can choose them under More options at any time to plan ahead.

How are FBA storage fees worked out?

By the cubic foot, per month, on the space your units take up: $0.78 for standard-size items from January to September and $2.40 from October to December, with lower rates for oversize items and higher ones for dangerous goods. The calculator multiplies the package's volume by the rate and by the number of months you expect a unit to sit. Sellers with a lot of slow stock may also pay a storage utilization surcharge, which is not included. See Amazon's monthly inventory storage fees page.

What fees are not included?

Fees that depend on your account rather than on the product: the inbound placement fee, the low-inventory-level fee, storage utilization and aged inventory surcharges, returns processing, and the $39.99 monthly Professional plan. It also leaves out the discount for items that ship in their own packaging, the lithium battery fee and the Overmax handling fee. Put a per-unit allowance under Anything else you pay.

Is this the same as Amazon's Revenue Calculator?

It works from the same published rates, but it needs no Seller Central login and no existing listing, so you can check a product idea before you have sourced it. Amazon measures each product itself, so once a product is in stock, check the Fee Preview report in Seller Central for the figures it is actually using.

Is this calculator connected to Amazon?

No. It asks for no Amazon login, reads nothing from your account and sends nothing anywhere. Everything is worked out in your browser. Amazon and FBA are trademarks of Amazon.com, Inc. or its affiliates, and this tool is not created by, endorsed by or affiliated with Amazon.