Amazon’s FBA Revenue Calculator lets you estimate your per-unit profit before you commit to selling a product through Fulfillment by Amazon. It auto-populates most Amazon fees, then lets you plug in your own costs so you can see a net margin estimate in seconds. Here’s how to use it step by step.
Find the Calculator and Search for a Product
The FBA Revenue Calculator is free and available on Amazon Seller Central. You don’t need an active seller account to access the basic version; just search “Amazon FBA Revenue Calculator” and you’ll find it on Amazon’s site.
Once you’re on the calculator page, you have two options for getting started:
- Search by ASIN or product name. If the product already exists on Amazon, type in its ASIN (the unique 10-character identifier on every Amazon listing) or the product name. The calculator will pull in the item’s current price, category, dimensions, and weight automatically.
- Define a new product. If the product isn’t listed on Amazon yet, select “Define product” and manually enter the product category, dimensions, and weight. This is useful when you’re sourcing a new private-label item and want to estimate fees before creating a listing.
Searching by ASIN is faster and more accurate because the calculator inherits the exact data Amazon already has on file. If you’re evaluating a competitor’s product or a wholesale item, grab the ASIN from the product URL and paste it in.
Set Your Selling Price
After selecting a product, the calculator may pre-fill the current listing price. You can override this with any price you plan to charge. This is where scenario testing starts: try a few different price points to see how your margin shifts. Even a dollar or two can meaningfully change your net profit because Amazon’s referral fee is a percentage of the sale price (typically 8% to 15% depending on the category).
Understand the Fees It Calculates Automatically
The calculator handles most of Amazon’s standard selling fees for you. Once you enter or confirm the product details and price, it populates estimates for:
- Referral fee. A percentage of the selling price that Amazon charges on every sale. The rate varies by product category.
- FBA fulfillment fee. The per-unit cost for Amazon to pick, pack, and ship your item to the customer. This depends on the product’s size and weight.
- Monthly storage fee. What Amazon charges to store your inventory in its warehouses, calculated per cubic foot.
- Variable closing fee. An additional per-item fee that applies to certain categories like media products (books, DVDs, etc.).
The calculator also reflects newer fee types. Amazon’s inbound placement service fee and low-inventory-level fee are both factored into current estimates. The low-inventory-level fee kicks in when your inventory drops below 28 days of supply relative to customer demand, so it’s worth knowing that keeping stock levels healthy can reduce your per-unit costs.
Enter Your Own Costs
This is the step most new sellers rush through, and it’s the one that determines whether the profit number you see is realistic. The calculator shows Amazon’s fees, but it doesn’t know what you paid to make and ship the product. You need to manually enter these figures.
Cost of Goods
Enter the per-unit cost to manufacture or purchase your product. If you bought 1,000 units from a supplier for $5,000, your cost of goods is $5 per unit. This should include the raw materials and labor your supplier charges, not your shipping costs (those go in a separate field).
Shipping to Amazon
You’ll also want to account for the cost of getting inventory from your supplier to Amazon’s warehouse. Calculate this as a per-unit figure. If you shipped 1,000 units from your manufacturer to a fulfillment center for $2,000, that’s $2 per unit. Some sellers have a two-leg journey: supplier to a domestic warehouse, then warehouse to Amazon. Add both legs together for your total inbound cost per unit.
Miscellaneous Costs
The calculator includes a “Miscellaneous cost” field where you can add expenses it doesn’t auto-calculate. This is the right place for things like long-term storage fees (charged on inventory sitting in Amazon’s warehouses for over 181 days), removal order costs, return processing fees, product inspection costs, or customs duties if you’re importing. Leaving this field at zero will overstate your profit, so estimate conservatively. Even adding $0.50 to $1.00 per unit here can give you a more honest margin picture.
Read the Results
After you’ve entered everything, the calculator displays a side-by-side breakdown. You’ll see your selling price at the top, each fee line-itemized below it, and a net profit (or net margin) figure at the bottom. Most versions of the calculator also show a net margin percentage, which is your profit divided by the selling price.
Pay attention to the fee breakdown, not just the bottom line. If fulfillment fees eat up a disproportionate share of your revenue, the product might be too heavy or oversized for healthy FBA margins. If the referral fee is high, you’re in a category where Amazon takes a bigger cut and you’ll need stronger volume or a higher price to compensate.
Compare FBA to Merchant Fulfillment
The calculator typically shows two columns: one for FBA and one for Fulfillment by Merchant (where you ship orders yourself). This lets you compare the cost structure side by side. FBA fees are higher, but you’re paying for Amazon to handle storage, packing, shipping, and customer service. If you already have warehouse space and a shipping operation, the merchant fulfillment column helps you see whether the convenience of FBA justifies the added cost.
For the merchant fulfillment column, you’ll need to enter your own estimated shipping cost per unit and any storage or handling costs you incur. The calculator still applies Amazon’s referral fee in both columns since that’s charged regardless of how you fulfill orders.
Run Multiple Scenarios
The real power of the calculator is in running it repeatedly. Change the selling price by a few dollars and see what happens. Swap in a lighter version of the product to check how a lower weight affects fulfillment fees. Model what your margins look like at different cost-of-goods levels so you know the maximum you can pay a supplier and still make money.
A useful exercise: find the break-even selling price. Lower your price in the calculator until the net profit hits zero. That tells you the floor below which you’d lose money on every sale, which is critical information when competitors start a price war or you want to run a promotion.
Limitations to Keep in Mind
The calculator gives you an estimate, not a guarantee. It uses current fee schedules, which Amazon updates periodically. It also assumes a single standard sale with no advertising spend. If you’re running PPC ads to drive traffic to your listing, you’ll want to add your estimated advertising cost per unit into the miscellaneous field to get a true profit picture.
Seasonal storage surcharges (typically October through December) can also raise your monthly storage costs above what the calculator shows by default. If you plan to hold inventory through the holiday season, factor in the higher rate manually.