Source smarter without ever opening a spreadsheet
Instantly calculate WFS and FBA fees on any listing you browse
- Precise WFS & FBA fees
- UPC product details
- Real-time stock data
- 30-day sales history
Free Chrome extensionNo subscription
Built for the way sellers actually source
Why resellers keep Flashpricer pinned to their toolbar
Real fee math
WFS and FBA fees are calculated from the actual dimensions in the box, not the size printed on the listing. Referral, fulfillment, and storage fees roll into one number you can trust.
Side-by-side profit
See WFS vs. FBM and FBA vs. FBM net profit on the same screen. Just plug in your costs and you'll know in seconds whether a listing is worth sourcing.
Full competitor view
See every seller on the listing, plus their fulfillment method, current stock, feedback rating, and handling time, without leaving the page or paying for a separate tool.
Item history
30-day sales estimates, historical Buy Box rotation, and price trends appear right on the listing. Spot demand and competition before you ever pull a spreadsheet.
FAQ
Fee calculator questions, answered
Is the Flashpricer fee calculator free?
Yes. The WFS & FBA fee calculator is a free Chrome extension with no subscription. It adds its data right on Amazon and Walmart product pages as you browse.
How does it calculate WFS and FBA fees?
It uses the actual dimensions of the item in the box, not the size printed on the listing, so fulfillment fees match what you will really pay. Referral, fulfillment, and storage fees roll into one number.
Can I compare WFS or FBA against fulfilling orders myself?
Yes. Enter your costs and the extension shows WFS vs. FBM and FBA vs. FBM net profit side by side, so you can see which fulfillment method earns more on that listing before you source it.
What competitor data does the extension show?
Every seller on the listing, with their fulfillment method, current stock, feedback rating, and handling time. You also get 30-day sales estimates, Buy Box rotation history, and price trends without leaving the page.
How does the fee calculator work with Flashpricer repricing?
The extension helps you decide what to source. Once those items are listed, Flashpricer repricing keeps them priced to win the Buy Box at the most profitable price, with every price kept above a minimum built from your real costs.
Our extension will help you source smarter and faster
Once you know what to source, Flashpricer repricing helps you sell it at the most profitable price.
Better dataActionable competitor infoAccurate selling fees
Try it free for 14 days
Every plan pushes price changes in under 30 seconds. No speed tiers, no upsell to go faster.
Compare plans →Set it up with an expert
Book a call and a repricing expert will build your first strategies with you. Most sellers are live in about 15 minutes.
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