Helpful Toolbox

Amazon FBA Calculator

Work out what an Amazon FBA sale actually leaves you per unit. Enter your selling price and costs, tweak the referral, fulfillment and storage fees to match your product, and see net profit, margin and ROI update live.

📖 How it works & FAQ

What this FBA calculator includes

Selling on Amazon FBA means your sale price gets carved up before you see a cent. This calculator subtracts the four costs that matter most: the referral fee (Amazon's commission, 15% for most categories but as low as 8% for some), the FBA fulfillment fee (the per-unit pick, pack and ship charge, which scales with size and weight), monthly storage allocated per unit, and your own landed cost — what you paid for the product plus inbound shipping to Amazon's warehouse. What's left is your net profit per unit, shown alongside margin and ROI so you can judge a product from both angles. All fee figures are approximate defaults you can edit; check Amazon's current fee schedule before committing, and treat results as estimates only, not financial advice. Everything runs in your browser — nothing you type is sent anywhere.

How to use it

  1. Enter your planned selling price.
  2. Add your product cost per unit and inbound shipping per unit (total freight divided by units in the shipment).
  3. Check the referral fee percentage — 15% covers most categories, but verify yours.
  4. Pick a size tier to load a typical fulfillment fee, then overwrite it with the exact figure from Amazon's revenue calculator if you have it.
  5. Set a monthly storage estimate per unit, then read your net profit, margin and ROI — results update live.

FAQ

What's a good FBA margin or ROI?
Many private-label sellers target at least a 30% margin and 100% ROI to leave room for ads, returns and price drops. Thin-margin products get wiped out by a single fee increase.
How do I estimate storage per unit?
Divide your expected monthly storage bill by the units you expect to sell that month. Fast-moving inventory might cost a few cents per unit; slow movers and Q4 storage cost far more.
Does this include PPC or returns?
No. Advertising, returns processing and refund losses vary too much to default sensibly — add an average per-unit figure to your product cost if you want them reflected.
Why is my number different from Amazon's calculator?
Amazon prices fulfillment by exact dimensions and weight. Our tiers are ballpark defaults — paste in the precise fee for your ASIN for a tighter estimate.