An Amazon FBA profit calculator shows exactly how much you keep after Amazon's referral fee, FBA fulfillment fee, storage costs, and ad spend are deducted from your selling price. Because fees can easily consume 30–45% of revenue, calculating FBA profit before you source a product is essential for sustainable Amazon selling.
FBA Profit Calculator
Manufacturing cost, sourcing price
Freight / prep cost per unit to FBA warehouse
Or enter a custom rate below
Or enter a custom fee below
Typically $0.05–$0.40/unit/month depending on size & season
Total monthly PPC spend ÷ units sold per month
Fee & Cost Breakdown
Amazon FBA Fee Reference
| Fee Type | Rate / Amount | Notes |
|---|---|---|
| Referral Fee | 6–45% (typically 15%) | Varies by category; min $0.30/item |
| FBA Fulfillment | $3.22–$89.98+ | Based on size tier and weight |
| Storage (Jan–Sep) | $0.87/cu ft (standard) | Per cubic foot per month |
| Storage (Oct–Dec) | $2.40/cu ft (standard) | Peak season surcharge |
| Closing Fee | $1.80 (media) | Books, music, video, software only |
How to Use the Amazon FBA Profit Calculator
Selling on Amazon FBA can be highly profitable — but only if you understand the true cost structure before you source a product. Amazon charges several layers of fees that can silently consume 30–45% of your selling price. This Amazon FBA profit calculator gives you a clear, real-time picture of your net profit per unit, profit margin, ROI, and break-even point so you can make confident sourcing decisions.
Step 1: Enter Your Selling Price and Costs
Start with your planned selling price — the amount customers pay on Amazon. Then enter your product cost (what you pay your supplier per unit), and your shipping to Amazon cost per unit (freight, prep, and labeling costs divided by the number of units in the shipment). These inputs form the foundation of your cost of goods sold (COGS).
Step 2: Select Your Product Category
Amazon's referral fee varies significantly by category. Most categories charge 15%, but Electronics is only 8%, Clothing is 17%, and Jewelry is 20%. Select your product category from the dropdown, or enter a custom referral fee percentage if your category has a different rate. The minimum referral fee is $0.30 per item regardless of category.
Step 3: Choose Your FBA Size Tier
Amazon determines your FBA fulfillment fee based on the size and weight of your packaged product. Small standard items (under 4 oz, fitting in a shoebox) start at $3.22. Large standard items range from $4.75 to $7.25 depending on weight. Oversize items have much higher fees starting at $9.73. Measure your product after packaging and select the appropriate tier. You can also enter a custom fee if you have an exact quote from Amazon Seller Central.
Step 4: Add Storage and Advertising Costs
Monthly storage fees add up, especially for slow-moving inventory or during October–December peak season. Enter your estimated per-unit monthly storage cost — typically $0.05 to $0.40 per unit depending on product size. If you run Amazon PPC ads, divide your monthly ad spend by units sold to get your ad cost per unit and enter it in the advertising field. Including these costs gives you a far more accurate picture of your real Amazon FBA profit.
Step 5: Analyse the Results
The calculator displays your net profit per unit, profit margin percentage, ROI, and break-even units. Aim for a profit margin of at least 20–25% and an ROI of 50% or higher for a viable FBA product. The stacked bar chart shows how each fee and cost component consumes a portion of your selling price, making it easy to see where the biggest opportunities for margin improvement lie. If your margin is below 15%, the tool will warn you — at that level, any increase in ad spend, returns, or competition could push you into a loss.
For a detailed walkthrough, see our guide: Amazon FBA Profitability Guide.
FAQ
What is Amazon FBA and how do fees work?
FBA (Fulfillment by Amazon) lets sellers store products in Amazon's warehouses and have Amazon handle picking, packing, shipping, and customer service. Amazon charges a referral fee (a percentage of the selling price, typically 8–17% depending on category), an FBA fulfillment fee (based on product size and weight, starting at $3.22 for small standard items), and monthly storage fees. These fees stack up quickly, making a profit calculator essential before pricing your products.
How is the Amazon referral fee calculated?
Amazon's referral fee is a percentage of the total selling price (including any shipping you charge), with a minimum referral fee of $0.30 per item. Rates vary by category: most categories are 15%, Electronics is 8%, Clothing & Accessories is 17%, Jewelry is 20%, and Amazon Device Accessories is 45%. Always check the current Amazon fee schedule for your specific category before listing.
What are FBA fulfillment fees based on?
FBA fulfillment fees are determined by the product's size tier, which is based on dimensions and weight after packaging. Small standard items (under 4 oz, fits in a shoebox) start at $3.22. Large standard items range from $4.75 to over $6.00 depending on weight. Oversize and heavy items have higher fees, from $9.73 and up. Use this calculator to select your size tier and see the fee applied automatically.
What is Amazon monthly storage fee?
Amazon charges monthly inventory storage fees per cubic foot for storing your products in FBA warehouses. Standard-size rates are approximately $0.87/cu ft from January–September and $2.40/cu ft from October–December (peak season). Oversize rates are $0.56/cu ft and $1.40/cu ft respectively. Long-term storage fees also apply to inventory older than 365 days. Enter your per-unit monthly storage cost in the calculator to factor this into your profit.
What is a good profit margin for Amazon FBA?
A healthy Amazon FBA profit margin is generally considered to be 20–30% or higher after all fees. Margins below 15% leave little buffer for advertising spend, returns, or price competition. Many experienced FBA sellers aim for a minimum 25% margin and an ROI of 50% or more on their cost of goods. Use the break-even units figure to understand how many units you need to sell each month to cover fixed costs.
How is ROI calculated for Amazon FBA?
ROI (Return on Investment) for Amazon FBA is calculated as net profit divided by total cost, expressed as a percentage. For example, if your product costs $10 (including shipping to Amazon) and you net $5 profit after all fees, your ROI is 50%. A higher ROI means your capital is working harder for you. This calculator computes ROI automatically once you enter your selling price, product cost, and fees.
Is this FBA profit calculator free to use?
Yes, this Amazon FBA profit calculator is completely free with no signup, account, or subscription required. All calculations run locally in your browser — no data is sent to any server. You can use it as many times as you like to model different products, price points, and fee scenarios before deciding what to sell on Amazon.
Does this calculator include Amazon PPC advertising costs?
Yes. The optional 'Advertising spend per unit' field lets you enter your average Amazon PPC (pay-per-click) ad cost per unit sold. This is deducted from your net profit so you see true after-ad profit and margin. To find your ad cost per unit, divide your total monthly ad spend by the number of units sold in that month. Factoring in PPC is critical for accurate profitability analysis on Amazon.