How To Use Sellerboard Extension - Amazon FBA Profit Calculator Explained

If you sell on Amazon, you probably know the struggle of figuring out a product’s real profit.

You click through listings, compare fees, and still wonder what’s actually left after Amazon takes its cut.

That’s where the Sellerboard extension comes in.

This free browser plugin shows your potential profit, Amazon fees, and estimated sales directly on any product page.

It’s built for FBA sellers who want quick, accurate numbers without juggling spreadsheets or extra tabs.

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In this guide, I’ll walk you through what the Sellerboard extension does, how it works, which marketplaces it supports, and how you can start using it today.

But before we go deeper, here’s a quick reminder: you can try Sellerboard’s full profit analytics tool with my exclusive 2-month free trial offer (no credit card required).

Also, I have a detailed video tutorial featuring Jenny Adams from Sellerboard herself, where we cover everything step-by-step.

You can check it out below:

Now, let’s get started.

What Is the Sellerboard FBA Profit Calculator Extension?

The Sellerboard extension is a browser add-on that helps you research and source new Amazon products by calculating all key profitability metrics directly on the product page.

Once installed, it automatically shows estimates for:

1. FBA fees

2. Referral fees

3. Storage fees

4. Sales volume

5. Estimated profit margins

Simply enter your buying price, and the extension will calculate your daily and monthly profits instantly.

It’s lightweight, accurate, and easy to use.

Download Sellerboard Extension Here

How Does the Sellerboard Extension Work on Amazon?

Once installed, the extension integrates seamlessly into the Amazon product detail pages.

When you visit any product, you’ll see a small Sellerboard widget that displays real-time calculations.

Here’s what happens behind the scenes:

1. The extension reads the product’s BSR (Best Seller Rank) and category.

2. It estimates daily and monthly sales volume based on that data.

3. It pulls product details like dimensions, weight, and selling price to estimate FBA and storage fees.

4. You can enter your cost of goods, and it instantly shows your net profit and ROI.

So as you browse, you’re literally seeing how profitable a product could be without using a separate tool or spreadsheet.

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What Costs and Metrics Does the Extension Calculate?

Sellerboard’s calculator is built to give you a realistic profitability snapshot.

It includes:

1. Amazon Fees → Referral fee, FBA fulfillment fee, and monthly storage fee.

2. Cost of Returns → You can edit the return rate (e.g., 2%) to see its impact on profit.

3. Product Cost → Enter your sourcing price to calculate exact profit margins.

4. Estimated Sales → Based on the product’s BSR and category performance.

5. Profit Per Unit, Daily, and Monthly → The plugin breaks it all down automatically.

Everything is editable, which means you can tweak parameters like selling price or package dimensions to see how changes affect profitability.

How Accurate Are the Sales and Profit Estimates?

The accuracy is quite solid.

Sellerboard bases its sales estimates on BSR data, using category-specific algorithms refined over years of Amazon analytics experience.

Of course, as with any estimation tool, the numbers can fluctuate due to sudden changes in price, category ranking, or competition.

Still, among all free tools available, Sellerboard delivers one of the most realistic snapshots of potential sales and profit.

What’s even better is its flexibility.

Every field is editable.

You can manually adjust inputs like cost, selling price, or return rate to reflect your actual product scenario.

That makes Sellerboard a powerful companion for both product research and profit forecasting.

If you’d like to see how it performs in real life, I’ve published a detailed test where I compared Sellerboard’s estimates with my actual Amazon sales data.

You can read it here: Is Sellerboard Accurate?

Which Amazon Marketplaces Are Supported?

The Sellerboard FBA Profit Calculator works on seven major Amazon marketplaces:

1. United States (amazon.com)

2. United Kingdom (amazon.co.uk)

3. Canada (amazon.ca)

4. Germany (amazon.de)

5. France (amazon.fr)

6. Italy (amazon.it)

7. Spain (amazon.es)

This makes it a handy companion for international sellers who want to analyze multiple markets without needing separate tools.

Is the Sellerboard FBA Profit Calculator Free?

Yes, it’s 100% free.

No subscriptions, no hidden costs.

Just install the browser plugin and start using it immediately.

It’s designed as a companion tool for Sellerboard’s full profit analytics software (which handles full account-level tracking), but the calculator itself is completely free to use for everyone.

How to Get Sellerboard’s Full Profit Analytics Tool

If you like the extension, you’ll love the full Sellerboard dashboard.

It connects directly to your Amazon Seller Central account to give you:

1. Real-time profit analytics

2. PPC and ad cost tracking

3. Refund and return metrics

4. Inventory management tools

5. Automation for profit reports

The best part?

You can try all of these features free with my exclusive Sellerboard offer; no credit card required.

Use the trial to explore the full dashboard and see how it fits your business before committing.

Get Sellerboard 2 Months Free Trial

Where to Get Help or Share Feedback

If you run into any issues or have feature suggestions, the Sellerboard team is super responsive.

You can contact them directly via email: support@sellerboard.com.

They’re always open to feedback from sellers and regularly update the tool to improve accuracy and performance.

Final Thoughts

If you’re doing product research for Amazon FBA, the Sellerboard FBA Profit Calculator Extension can save you hours of manual calculations.

It’s a clean, reliable way to gauge profitability instantly while browsing Amazon.

And when you’re ready to go beyond product-level insights and track your actual store profits, try the full version of Sellerboard with my exclusive 2-month trial - completely risk-free.

Get Sellerboard 2 Months Free Trial

P.S. - Sellerboard also works for Shopfiy, here's a full tutorial of Sellerboard for Shopify sellers. Enjoy!