Amazon FBA Calculator — Free Online Tool
Selling on Amazon FBA looks profitable until the fees arrive. This Amazon FBA calculator breaks down referral fees, fulfillment fees, and landed product costs to reveal your true net profit per unit — before you commit to inventory.
What is the Amazon FBA Calculator?
Amazon takes its cut in several ways, and new sellers routinely underestimate the total. The referral fee (typically 15% in most categories) comes off the selling price, then the FBA fulfillment fee covers picking, packing, and shipping to the customer — it scales with the product's size and weight tier. Add your product cost and freight to Amazon's warehouses, and a $30 product can easily carry $12 or more in fees and costs.
The number that matters is net profit per unit and margin. Experienced sellers usually target at least 25–30% margin after all costs, because advertising (PPC), returns, and storage fees eat further into it. Use this Amazon FBA calculator to test pricing scenarios: nudge the price up $2 or negotiate product cost down $1 and watch the margin move — small changes compound across thousands of units.
How to use this calculator
- Enter your planned selling price on Amazon.
- Enter your product cost per unit (what you pay the supplier).
- Add shipping to Amazon per unit (freight and prep, if any).
- Set the referral fee % for your category (15% is typical — check Seller Central).
- Enter the FBA fulfillment fee for your size tier, then click Calculate.
Formula
Frequently asked questions
What are Amazon FBA fees?
Two main ones: the referral fee (a percentage of the selling price, usually 15%) and the FBA fulfillment fee (a flat fee by size and weight tier covering pick, pack, and ship). Storage fees apply separately for inventory sitting in warehouses.
What is a good profit margin for Amazon FBA?
Most successful sellers target 25–30% or higher net margin after all costs, leaving room for PPC advertising, returns, and price competition.
Does this Amazon FBA calculator include PPC advertising costs?
No — ad spend varies too much to estimate generically. Subtract your expected ad cost per sale from the net profit shown here.
How do I find my exact FBA fulfillment fee?
Use Amazon's official FBA Revenue Calculator in Seller Central: enter your product's dimensions and weight to get the exact tier fee.