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Amazon FBA fee calculator

Estimate Amazon referral, fulfillment and storage fees and your net FBA profit.

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Amazon FBA fee calculator
Paste one product per line as product;price;cost;length;width;height;weight and this tool works out what Amazon-style FBA fees would leave you with. Sellers use it to sanity-check a supplier quote, compare several SKUs at once, or see whether a price increase actually rescues a thin margin once fees are subtracted.
The category option sets the referral-fee percentage taken from the selling price — general merchandise, electronics, clothing, beauty, home & kitchen and toys each carry a different rate. The size tier can be derived automatically from the dimensions and weight, or forced manually when you already know which tier a listing falls into; it drives the fulfillment fee, which adds a per-kilogram charge once a product passes its tier's free-weight allowance. Storage fee comes from the parcel's volume, the storage period (standard or the pricier peak season) and how many months to charge. Add a flat inbound-shipping cost per unit to see its effect on the bottom line, and set a target margin to have every row marked as meeting it or falling short.
Rows are separated by line breaks and fields by semicolons; a malformed line or a non-positive number is reported rather than silently skipped, so a typo in one row never hides a real result in the others. Both Windows and Unix line endings work, and the table updates as you type. The fee formulas are an illustrative estimate of Amazon's rate-card shape, not a live feed of current published rates — check Amazon's own seller rate card before pricing a real listing.
Everything runs locally in your browser: no product prices, costs or supplier details are ever uploaded anywhere. Copy the report, download it as a .txt file, or send the output back into the input to test another round of prices.
FAQ
How is the size tier decided?
By default it is derived from the longest side, the two other sides and the weight you enter, using thresholds that approximate small-standard, large-standard, large-bulky and oversize bands. Pick a tier manually in the options when you already know it.
Are these Amazon’s actual current fees?
No. The referral, fulfillment and storage numbers are an illustrative estimate that follows the shape of a real FBA rate card, useful for comparing products and scenarios. Check Amazon’s published rate card for exact figures before pricing a live listing.
What do the currency and units options change?
Currency only changes the symbol shown next to each amount — it does not convert values. Units controls whether length, width, height and weight are read as centimetres and kilograms or inches and pounds; the tool converts internally so the size tier and fees come out the same either way.
What happens to a line with missing or invalid numbers?
That line is skipped and listed at the end of the report with its line number, so you can fix it, while every other row is still calculated normally.
Is my product or pricing data uploaded anywhere?
No. The calculation runs entirely in your browser — nothing you paste here is sent to a server.