b2KIT

Amazon FBA Fee Calculator

Calculate Amazon FBA fees including referral, fulfillment, storage, and long-term storage fees with profitability analysis per product.

Tested tool guide Tested browser tools Checked August 16, 2026

What Amazon FBA Fee Calculator does and how it behaves

Enter a product's category, sale price, weight, dimensions, and cost of goods, and this tool works through Amazon's FBA fee stack step by step: referral fee by category, pick-and-pack fulfillment fee by size tier and weight, monthly storage fee per cubic foot, and a long-term storage surcharge if inventory sits past Amazon's aging threshold. It nets those against your sale price and cost to show per-unit profit and margin. The detail people most often miss is that fulfillment fees key off dimensional weight when a package is oversized relative to its actual weight, not actual weight alone.

How the result is produced

1

Fee stack applied in Amazon's order

The calculator layers fees the way Amazon actually charges them: a referral fee (a percentage of sale price set by product category, subject to a per-item minimum), then a fixed FBA fulfillment fee set by size tier and weight, then a monthly storage fee priced per cubic foot of space the inventory occupies. Each fee reduces the running profit figure shown next to the breakdown.

2

Size tier and weight, not price, drive most fees

Fulfillment and storage fees key off package length, width, height, and weight rather than sale price, so a small dimension change can push a product into a different size tier and move the fee more than a price change would. Long-term storage fees apply separately once units cross Amazon's inventory-age threshold, independent of the size tier.

Good uses

  • checking whether a new SKU is worth listing on FBA before sending inventory to a fulfillment center
  • comparing profitability across product variants of different sizes or weights before choosing which to launch
  • re-checking an existing listing's margin after Amazon updates its fee schedule

Limits and checks

  • Amazon revises referral fee percentages, fulfillment fee tables, and storage rates on its own schedule, sometimes mid-year; confirm the rates behind this calculator match Amazon's current published fee schedule before using the output for a pricing decision.
  • Long-term storage fees depend on inventory-age bands that Amazon has changed in past years, so a product that looks profitable today can turn negative once units age past whatever threshold is currently in effect.
  • The output covers referral, fulfillment, and storage fees but not every possible FBA charge - inbound placement fees, removal or disposal orders, returns processing, and advertising spend are typically separate and can lower real landed profit below the figure shown.

Common questions

Does this include Amazon's inbound placement fee?

Only if the calculator has an explicit field for it. Amazon charges a separate per-unit inbound placement fee tied to how inventory is distributed across fulfillment centers, apart from referral, fulfillment, and storage fees, so check whether that input exists before assuming the total is complete.

Can I use this for a non-US Amazon marketplace like Amazon.ca or Amazon.co.uk?

No. The fee categories, size tiers, and storage rates here follow the US marketplace fee schedule. Other marketplaces use different referral fee tables and currencies, so results won't be accurate for non-US listings unless the tool explicitly offers a marketplace selector.

References and verification

The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.

Related Tools