Introduction
Selling on Amazon through FBA (Fulfillment by Amazon) can be a great way to make money, but you need to know your costs before you start. Amazon charges fees for storing and shipping your products, and those fees eat into your profit. This free FBA calculator helps you see exactly how much you will earn on each sale.
Enter a product ASIN or pick one of the examples to get started. The calculator pulls in product details like weight, size, and category, then figures out your Amazon referral fee, FBA fulfillment fee, and monthly storage fee. It also shows your net profit, profit margin, and return on investment (ROI) per unit. You can change the sell price, cost of goods, and shipping costs to test different scenarios.
The tool supports 10 Amazon marketplaces, including the US, UK, Canada, Germany, and more. It adjusts currency, units, and fee structures based on the marketplace you choose. You also get a full step-by-step breakdown of every calculation, revenue projections based on estimated monthly sales, and a visual chart that shows where each dollar of your sell price goes.
How to Use Our FBA Calculator
Enter your product details and costs below. The calculator will show you Amazon fees, net profit per unit, profit margin, ROI, and monthly revenue projections.
Amazon Marketplace: Pick the Amazon store where you sell. This sets the correct currency, units, and fee structure for your country. If you need to convert between currencies manually, try our Currency Calculator.
Product ASIN: Type or paste the 10-character ASIN for your product and click "Get Product Data." The tool will load the product title, dimensions, weight, category, price, and sales data. You can also click one of the example ASINs to try it out.
Data Set (Current or 30-Day Average): In the Price, Sales & Competition table, click "Select" next to the row you want to use. This fills in the sell price and estimated sales for you.
Sell Price: Enter the price you plan to charge per unit. This is the amount the customer pays on Amazon. If you need help setting the right price above your costs, our Markup Calculator can help you determine appropriate markups.
Inbound Shipping to Amazon: Enter what it costs you to ship one unit to an Amazon fulfillment center. If you need to estimate your shipping expenses, our Shipping Calculator can help.
Additional / Misc. Costs: Enter any extra per-unit costs like prep, labeling, or inspection fees.
Cost of Goods (COGS): Enter how much you pay to make or buy one unit of your product.
Est. Monthly Sales: Enter how many units you expect to sell each month. This is used for revenue and profit projections.
Number of Sellers: Enter how many sellers compete on this listing. The tool divides total sales and profit by this number to estimate your share.
Click "Calculate" to see your full fee breakdown, profit summary, revenue projections, step-by-step math, and a visual chart of where your sell price goes. Click "Reset" to return all cost fields to their default values.
What Is Amazon FBA?
FBA stands for Fulfillment by Amazon. It is a service where you send your products to Amazon's warehouse. When a customer buys your item, Amazon packs it, ships it, and handles returns for you. In exchange, Amazon charges you a set of fees for doing this work.
What Does This FBA Calculator Do?
This calculator helps you figure out if selling a product on Amazon FBA will make you money. You enter a product's ASIN (a 10-character ID Amazon gives every item), and the tool pulls up its details. It then calculates the three main Amazon fees — the referral fee, the FBA fulfillment fee, and the monthly storage fee — so you can see exactly how much Amazon takes from each sale.
After fees, it subtracts your own costs like the price you paid for the product, shipping to Amazon's warehouse, and any extra costs like labeling or prep. What's left is your net profit per unit. It also shows your profit margin and return on investment (ROI) so you can judge if the product is worth selling. If you want to know the minimum number of units you need to sell to cover your fixed costs, our Break Even Calculator is a useful companion tool.
Key Amazon FBA Fees Explained
The referral fee is a percentage of your sell price that Amazon keeps on every sale. The rate depends on the product category. For example, electronics pay 8%, while most other categories pay 15%.
The FBA fulfillment fee is a flat charge per unit that covers picking, packing, and shipping your item to the buyer. The amount depends on the product's size tier and its billable weight. Billable weight is the greater of the item's actual weight or its dimensional weight. Dimensional weight is found by multiplying length × width × height and dividing by 139. You can also use our dedicated Volumetric Weight Calculator to double-check this figure for any package.
The monthly storage fee is what Amazon charges to keep your product in its warehouse. It is based on how much space your item takes up, measured in cubic feet. Keeping track of lead times for your inventory can help you avoid overstocking and reduce these storage costs.
Why Profit Margin and ROI Matter
Profit margin tells you what percentage of your sell price you keep as profit after all costs. A higher margin means more money in your pocket per sale. ROI tells you how much profit you earn compared to how much you spent. If your ROI is 100%, you doubled your money. Both numbers help you decide if a product is a smart investment before you commit to buying inventory.
If you sell on other platforms alongside Amazon, our eBay Fee Calculator and Etsy Fee Calculator can help you compare fees across marketplaces. For a broader look at your e-commerce business health, consider tracking your customer acquisition cost and customer lifetime value to make sure your advertising spend is paying off over the long term.