Amazon's FBA Revenue Calculator is a free tool that every seller should use before buying any product for resale. It shows the exact fee breakdown for any product on Amazon, letting you calculate your true profit.
Accessing the Calculator
Search "Amazon FBA Revenue Calculator" in your browser, or access it through Seller Central under the advertising menu. The calculator is available for all Amazon marketplaces — make sure you are using the UK version (sellercentral.amazon.co.uk).
How to Use It
Enter the product's ASIN, UPC, or search for it by name. The calculator pulls up the product details. On the left side, you see the FBM (Fulfilment by Merchant) scenario. On the right, the FBA (Fulfilment by Amazon) scenario. For most sellers, the FBA column is what matters.
Enter your selling price (what you expect to sell the product for), your cost of goods (what you paid for the product), and any shipping costs to Amazon. The calculator then shows the referral fee, the FBA fulfilment fee, and your net profit.
Understanding the Output
The key numbers are the total Amazon fees (referral fee plus fulfilment fee), your net proceeds (selling price minus fees), and your profit (net proceeds minus your costs). The calculator also shows the profit margin as a percentage.
Pay attention to the fulfilment fee — this varies by product size and weight. A product that looks profitable based on the referral fee alone might have a high fulfilment fee that changes the picture entirely.
What It Does Not Include
The calculator does not include prep costs, storage fees, advertising costs, or return-related costs. You need to add these manually to get your true profit. A rough addition of £0.50–£1.50 per unit for prep and inbound shipping gives a more realistic picture.
Making It a Habit
Check the Revenue Calculator for every product before purchasing. No exceptions. It takes 60 seconds and prevents the single most common mistake in Amazon selling — buying a product that is not actually profitable after fees.
Bookmark it, add it to your home screen, and make it as automatic as checking the price. The sellers who use it religiously make money. The ones who skip it because they are "sure it will be fine" are the ones with warehouses full of unprofitable stock.