Calculator

Amazon FBA Fee Calculator

FBA changes the fee stack because Amazon starts charging for more than referral alone. Use this calculator to model referral, fulfilment, storage, and extra Amazon drag on the same order before deciding the product still deserves traffic.

Separate referral from FBA fulfilment drag
Bring storage into the order-level read
See payout and gross profit after Amazon cost layers

Calculate Amazon FBA fees

Enter sale price, quantity, product cost, referral fee rate, FBA fulfilment fee, storage drag, and any extra Amazon cost. This version is designed to show how the order changes once FBA handles the fulfilment instead of the seller.

Item sale price Selling price per unit before FBA fees. Quantity sold Used for per-unit fulfilment and storage cost. Shipping charged to buyer Included in the order value if you want it in the fee base. Product cost per unit Direct product or sourcing cost per unit. Referral fee rate % Amazon referral fees vary by category, so keep this adjustable. FBA fulfilment fee per unit Set this to the current FBA rate for your size tier and weight. Storage cost per unit Monthly storage drag allocated per unit sold. Other Amazon cost per order Prep, removals, disposal, or other order-level Amazon drag.

Three FBA order scenarios.

Formula

What the Amazon FBA model includes

Total Amazon FBA fees = Referral fee + FBA fulfilment fee + Storage fee + Other Amazon cost

Amazon says FBA costs depend on product size, weight, and storage volume. Referral fees also vary by category. That is why the calculator keeps the referral, fulfilment, and storage layers adjustable instead of pretending one fee profile fits every ASIN.

Where FBA usually changes the read

Heavier items can look profitable until fulfilment cost shows up.
Storage drag feels small until it is spread across slower inventory turns.
Referral alone almost never explains the full Amazon take on the order.

Useful next step

Once the FBA stack is clear, compare it against the simpler Amazon seller fee view and then test the order against payout margin or ROAS.