Amazon FBA Calculator: Free Vs Paid

When it comes to calculating profits, fees, and logistics, Amazon sellers rely heavily on FBA calculators. While free tools like Amazon’s Revenue Calculator and Inline Revenue Calculator offer basic estimates, they often miss key expenses and lack advanced features.

In this post, we compare Amazon FBA calculator: free vs. paid, highlighting why Seller Assistant’s FBM&FBA Calculator gives sellers a sharper edge. From real-time ROI to VAT and logistics insights directly on product and supplier pages – we’ll show you which tool actually helps you maximize profits and make smarter sourcing decisions.

Amazon Revenue Calculator

Description

Amazon FBA Revenue calculator is a free tool provided by Amazon to help sellers compare fulfillment options – Fulfilled by Amazon (FBA) vs. Fulfilled by Merchant (FBM). It estimates fees, profit, and net margin per unit based on selected fulfillment methods and product data. This tool is primarily used to evaluate which delivery method is more profitable for a particular product.

What it does

It calculates core Amazon selling costs such as referral fees, FBA fulfillment charges, and storage fees. Sellers can compare both FBA and FBM models side by side, adjusting variables like shipping costs, cost of goods sold (COG), and inbound placement preferences.

How it works

You can search for an existing product using ASIN or product name, or define a new one by entering dimensions and category. The tool pulls current pricing from Amazon and lets sellers input cost data to estimate profit per unit. The calculator updates profit/loss values in real time when any input field is adjusted.

Fees included in the Amazon Revenue calculator

• Amazon fees
  
  • Referral fee;
  • Fixed Closing fee;
  • Variable Closing fee

• Fulfillment costs
  
  • Inventory placement;
  • inbound placement service fee;
  • Tape;
  • Label;
  • Bagging;
  • Bubble wrap, etc.

• Monthly storage fees;
• Estimated cost per unit;
• Net profit per unit;
• Net Profit;
• Net Margin.

Fees not included in the Amazon Revenue calculator

• Monthly subscription fees
• Per-item fees
• Removal order fees
• Return processing fees
• Unplanned service fees
• FBA inventory storage overage fees
• Refund administration fees
• Rental book service fees
• High volume listing fees
• Other less common fees not explicitly listed as included.

How to use it step-by-step

Step 1. Search or define the product

• To begin, search for an existing product by ASIN or product name.
• If your product isn’t listed on Amazon, click Define product and manually enter its dimensions and category. Make sure to select the appropriate country to display the correct fees.

Step 2. Enter price and shipping details

• If you selected an existing product, the calculator will autofill the product data from the Featured Offer.
• For unlisted items, manually input the item price and seller-fulfilled shipping charges.
• You can also enter FBA inbound placement options, including the number of locations and inbound regions.

Step 3. Enter cost estimates

Add your cost of goods sold (COG) for each fulfillment method (FBA and FBM). You may also include other fulfillment-related expenses like bagging, labeling, or additional shipping costs for a more precise profit projection.

Step 4. Compare FBA and FBM options

• Use the fields to simulate different scenarios for FBA and FBM.
• Compare estimated fees, net margin, and total profit for each method.

Step 5. Adjust inputs to refine estimates

Any time you modify a field – such as price, COG, or shipping cost – the calculator will instantly update net profit, margin, and per-unit cost estimates to reflect the change.

Note. Results are only estimates and exclude some Amazon fees like VAT, removal, and return fees.

Price

Free.

Inline Revenue Calculator

Description

The Inline Revenue Calculator is a built-in Amazon tool that gives sellers a quick preview of estimated fees and net profit per unit directly within the Manage Inventory dashboard. It helps evaluate core fulfillment costs for each SKU already listed in your Amazon store. This tool is ideal for day-to-day pricing and profitability checks for active listings.

What it does

It estimates FBA-related fees and calculates projected net profit per unit. Unlike the standalone Revenue Calculator, the Inline version is integrated into your inventory view and works with existing SKUs. You can input your cost of goods, shipping, storage estimates, and optional services to refine the projections.

How it works

The calculator displays a clickable fee preview under the “Estimated fee per unit sold” column. Clicking it opens a detailed fee breakdown, including referral, fulfillment, and storage fees. Sellers can adjust additional cost inputs like inbound shipping and cost of goods sold (COG) for more precise net profit estimates.

Fees included in the Inline Revenue Calculator

• Referral fees
• FBA fulfillment fees for items sold in Amazon stores
• FBA inbound placement service fees
• Monthly storage fees
• Long-term storage fees
• Variable closing fees
• Per-item fees
• Optional Service fees

Fees not included in the Inline Revenue Calculator

• Monthly subscription fees
• Removal order fees
• Return processing fees
• Unplanned service fees
• Refund administration fees
• Rental book service fees
• High volume listing fees
• FBA Export
• Prime Wardrobe
• Other less common fees not explicitly listed as included.

How to use it step-by-step

Step 1. Open your inventory in Seller Central

Go to your Amazon Seller Central account and navigate to Inventory > Manage All Inventory to access your product listings.

Step 2. Find the target SKU

Scroll through your inventory and locate the specific SKU you want to analyze or enter product SKU. ASIN, or title in the search field and do search.

Step 3. Click the estimated fee value

In the Estimated fee per unit sold column, click on the displayed fee amount to launch the Inline Revenue Calculator for that product.

Step 4. Review the default fee breakdownView Amazon’s auto-generated breakdown of fees, including referral, fulfillment, inbound placement, storage, and optional service fees.

Step 5. Enter your custom valuesAdd your own cost data to refine the estimate:

• Cost of Goods Sold
• Shipping cost to Amazon
• Estimated storage fees
• Optional service fees

Step 6. Enable tax fields (optional)

If you need to account for taxes on Amazon fees, enable the tax estimate fields to view projected tax liabilities.

Step 7. Review updated net proceeds and profit

Check the recalculated net proceeds and profit per unit based on your input data.

Step 8. Customize visible fields

Click the settings icon in the upper-right corner to choose which cost fields are shown and to adjust default values like storage rates.

Note. Estimates reflect sales in Amazon stores only. Final fees may differ.

Price

Free.

Seller Assistant’s FBM and FBA Calculator

Description

Seller Assistant’s FBM and FBA Profit Calculator is a professional, browser-based profit calculator designed for Amazon sellers who need accurate, real-time insights. Unlike Amazon’s free tools, it works directly on both Amazon product pages and supplier websites, allowing you to instantly evaluate profitability, fulfillment costs, ROI, VAT, and margins – without switching tabs or manually copying data.

This calculator is part of Seller Assistant Extension, which includes advanced product sourcing features, IP alerts, restriction checks, and competitor analysis for Amazon arbitrage, wholesale, and dropshipping sellers.

Note. Seller Assistant is a comprehensive product-sourcing software that helps Amazon sellers quickly find high-profit deals. It combines three extensions: Seller Assistant Browser Extension, and IP-Alert Chrome Extension by Seller Assistant, and VPN by Seller Assistant, Amazon seller tools: Price List Analyzer, Brand Analyzer, Seller Spy, Bulk Restrictions Checker, and API integrations, and features: Storefront Widget, Side Panel View,  FBM&FBA Profit Calculator, Quick View, Stock Checker, IP Alert, Variation Viewer, Sales Estimator, Offers, and Restrictions Checker.

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It offers a robust toolkit of over 20 features built to streamline every part of the sourcing process  – from bulk scanning wholesale supplier sheets for high-margin leads to deep product research and advanced brand and competitor analysis. By using this FBA and FBM product sourcing software, you can easily identify products that have the potential to be sold well on Amazon.

What it does

• Calculates total Amazon fees for both FBA and FBM: referral, fulfillment, storage, inbound placement, etc.
• Works on Amazon product pages, supplier sites with side-by-side profit previews, and your competitor storefronts to detect profitable competitor items
• Estimates profit, ROI, and margin in real time
• Computes break-even point
• Customizes inputs like 3PL, shipping, prep, logistics, hazmat, and miscellaneous costs
• Supports US sales tax and European VAT, including multiple VAT schemes

How it works

Once the Seller Assistant Chrome Extension is installed, the calculator appears automatically on Amazon product pages and supplier websites. It extracts product details and overlays the calculator directly into your sourcing workflow.

You can select between FBA and FBM models, enter your Cost of Goods (COG), configure prep and shipping fees, apply taxes, and instantly see your profitability.

On supplier websites, the calculator appears in Side Panel View, allowing you to evaluate potential deals in real time before ever listing or buying the product.

FBM and FBA Calculator data

• Product price

The selling price of the product on Amazon, typically the BuyBox price. If the BuyBox price is unavailable, it defaults to the minimum price (including delivery). Pre-filled by the extension but can be adjusted manually.

• Cost of Goods Sold (COG)

The supplier price of the product, excluding shipping and taxes. Used to calculate profit, ROI, and margin. Must be entered manually.

• Current BuyBox and Historical Pricing

Shows current BuyBox price and compares it  to the 90-day average BuyBox price, calculates Buy Box price +2%, +5%, +10%. Automatically populated.

• Minimum FBA price

The lowest price offered by Fulfillment by Amazon seller

• Minimum FBM price

The lowest price offered by Fulfillment by Merchant seller

• Profit

Net earnings after deducting costs like COG, Amazon referral fees, FBA/FBM fees, logistics, storage fees, sales tax, and VAT. Calculated automatically; accurate input of other fields is necessary (logistics costs, ship, and prep).

• ROI (Return on Investment)

A percentage metric showing profitability relative to the investment (COG, tax, logistics). Automatically calculated based on other inputs.

• Margin

The percentage of profit generated from sales relative to the selling price. Automatically calculated.

• Amazon referral fees (R15%)

The fee Amazon charges per sale, typically 15% of the selling price (varies by category). Automatically applied based on the product category.

• FBA/FBM Fees

Costs associated with either Fulfillment by Amazon (FBA) or Fulfillment by Merchant (FBM), including picking, packing, and shipping. Selected from a dropdown based on the fulfillment method.

• Inbound Placement Service Fee (Plmt)

The fee for Amazon’s distribution of inventory across fulfillment centers. Select the placement type (minimal, partial, or optimized).

• Digital Service Fee (DST)

DST applies to selling on Amazon fees (referral fee, fixed closing fee, variable closing fee, and get-paid-faster fee) if you sell in the countries where the fee is paid (e, g. Canada, France, Spain), and FBA fees (UK and France)

• Storage fees

Monthly costs of storing inventory in Amazon’s warehouses, applicable for FBA. Automatically calculated.

• Logistics costs

Includes shipping, 3PL (third-party logistics), and prep center fees. Must be entered manually or pre-configured in the Seller Assistant Extension settings in your personal account.

• 3PL Costs

Costs for third-party logistics providers, covering shipping, preparation, and fragile handling. Must be entered manually unless pre-configured.

• Sales tax

Tax applied to sales, based on regional percentages. Enter the applicable tax rate in settings and enable the toggle.

• VAT (Value Added Tax)

Tax applied to goods sold internationally, varying by country. Select VAT scheme and rate in settings.

• BEP (Break-even point)

The minimum price needed to cover all expenses. Automatically calculated.

How to use it step-by-step

Calculate profitability on the Amazon product pages

Step 1. Open the product page

Navigate to the Amazon or supplier product page you want to analyze. If the Seller Assistant Extension is installed and active, the FBM & FBA Profit Calculator will automatically appear as an overlay.

Step 2. Enter your Cost of Goods (COG)

In the COG input field, enter your cost from the supplier. This is the base cost used to calculate profit, ROI, and margin.

Step 3. Select FBA or FBM model

Switch between FBA and FBM to compare fulfillment costs. The calculator will update with real-time data, including:

• Fulfillment costs
• Referral fee (R15%)
• Storage fees (Sto)
• Inbound placement service fees (Plmt)
• Digital services fee (if applicable)

Step 4. Add logistics and prep costs

• Enter logistics-related expenses:
  
  • Shipping to Amazon (per unit)
  • Prep center costs (e.g., labeling, bagging, bubble wrap)
  • Hazmat (dangerous goods) costs
  • Oversize prep and ship for gravy and bulky products
  • Miscellaneous costs

• You can also configure expenses in your Seller Assistant Personal Account settings.

Step 5. Apply tax or VAT if applicable

Use the toggle in the COG field to activate:

• Sales tax for U.S. sellers if needed

• VAT for EU or international sellers (choose from various VAT schemes)

Step 6. Review full profitability breakdown

Once your inputs are added, review the complete cost and profit analysis:

• FBA fees: Total Amazon fulfillment charges
• Referral fee (R15%)
• Plmt: Inbound placement service fee
• Sto: Monthly storage cost per unit
• 3PL: Combined third-party logistics (shipping + prep + fragile packaging)
• Profit per unit
• ROI (%) and margin (%)
• Break-even point
• VAT/Sales tax: If activated for your marketplace

Calculate profitability products on supplier websites

While browsing wholesale or retail supplier websites, use Seller Assistant’s Side Panel View to display Amazon listing data and calculate fees without leaving the page. This lets you make sourcing decisions in real time – evaluating both pricing and actual profitability on the spot.

To access Side Panel View, click the Extensions icon to the right of your address bar in Chrome browser and select Seller Assistant Extension. Side Panel View will appear as a side panel on the right side of your page.

The calculator will show the same data as on the Amazon product page (as described above).

Amazon FBA calculator: free vs. paid – key benefits and which one you should use

Choosing the right Amazon FBA calculator depends on how deep you need to go with your cost analysis and how many products you're researching. Here's a breakdown of what the free and paid tools offer – and which type of seller each one is best for.

Price

Seller Assistant offers flexible pricing plans. The price starts from $13.33. The FBM and FBA Calculator is included in all plans.

Free calculators: best for basic, one-off estimates

Amazon Revenue Calculator and Inline Revenue Calculator are ideal for beginner sellers or those looking to analyze a few SKUs at a time. They're easy to access, offer solid core fee estimates, and are 100% free.

What you get

• Basic per-unit fee breakdowns
• Comparison of FBA vs. FBM
• Integration with Seller Central (Inline version)
• No login or additional tools required

Limitations

• No on-page VAT or sales tax support
• Manual data entry
• No export or history tracking
• Doesn’t cover all fee types or prep costs

Best for

• New Amazon sellers
• Sellers with a small catalog
• One-off profitability checks

Paid calculator: best for detailed, scalable analysis

Seller Assistant’s FBM & FBA Calculator is built for sellers who analyze dozens or hundreds of products daily. It shows the full cost structure – including 3PL, VAT, storage, and labeling – and works directly on Amazon and supplier websites.

What you get

• Real-time FBA/FBM fee breakdowns
• ROI, profit, margin, and break-even point
• Full tax & VAT support (including EU schemes)
• Works directly on Amazon and supplier sites
• Side Panel View for product sourcing
• Google Sheets export
• Part of an all-in-one seller toolkit

Best for

• Online arbitrage, wholesale, and dropshipping sellers for easy instant profitability analysis
• High-volume product researchers to check deals in-depth
• European sellers with VAT requirements
• Sellers looking to simplify on-page supplier research

Final Thoughts

Choosing the right Amazon FBA calculator depends on how deep your analysis needs to go. If you're just starting out or checking a few SKUs occasionally, Amazon’s free tools – Revenue Calculator and Inline Revenue Calculator – offer a fast, no-cost way to get basic profit estimates.

But for serious sellers working at scale, precision matters. Seller Assistant’s FBA&FBM Profit Calculator gives you the full financial picture – including prep, logistics, taxes, and VAT – directly on Amazon and supplier pages. With real-time updates, export features, and side-by-side profit visibility, it’s built to support smarter, faster sourcing decisions.

Seller Assistant automates and connects every stage of your Amazon wholesale and arbitrage workflow. It brings together in one platform: workflow management tools — Purchase Orders Module, Supplier Database, Warehouse Database, bulk research & sourcing tools — Price List Analyzer, Bulk Restriction Checker, Sourcing AI, Brand Analyzer, Seller Spy, Chrome extensions — Seller Assistant Browser Extension, IP-Alert Extension, and built-in VPN by Seller Assistant, and integrations & team access features — seamless API connectivity, integrations with Zapier, Airtable, and Make, and Virtual Assistant Accounts.