Know your profit from every angle
Compare FBA and FBM, then check ROI, margin, max cost, and break-even before you buy.
FBA + FBM in one view
View full calculator image
✦ Free Chrome extension
The Best Amazon Profit Calculator Is Free.
Get profit analysis, fees, sales data, competition, variations, gating checks and more — without another monthly subscription.
- $0/month. No credit card required.
- Profit, fees, sales, and competition in one view.
- Works on Amazon and Walmart product pages.
- Part of the 3P Mercury workflow when you’re ready.
Free to use · No credit card · Start analyzing
Side-by-side
The paid-calculator feature set. A $0 price tag.
Get the core analysis sellers expect, then go further with 3P Mercury’s connected tools.
| Capability | 3P Mercury | SellerAmp | AZInsight |
|---|---|---|---|
| Core analysis | |||
| Profit analysis | ✓ | ✓ | ✓ |
| Amazon fee analysis | ✓ | ✓ | ✓ |
| Sales & velocity analysis | ✓ | ✓ | ✓ |
| Competition analysis | ✓ | ✓ | ✓ |
| Historical data | ✓ | ✓ | ✓ |
| Eligibility & risk checks | ✓ | ✓ | ✓ |
| Variation analysis | ✓ | ✓ | ✓ |
| Cost & deal adjustments | ✓ | ✓ | ✓ |
| Save leads / analysis history | ✓ | ✓ | ✓ |
| Distinct 3P Mercury workflows* | |||
| Above BB indicator in the calculator | ✓ | Not documented | Not documented |
| 1-click saved supplier deal stacking | ✓ | Not documented | Not documented |
| M.E.R.C. A.I. lead analysis | ✓Paid plan | Not documented | Not documented |
| Connected sourcing → shipping workflow | ✓Paid plan | Not documented | Not documented |
| Calculator price | FREE$0/month | $19.95+per month | $19.95per month, Advanced plan |
* The red × means the exact named 3P Mercury workflow was not documented in the competitor pages reviewed. It does not mean those tools lack related features. SellerAmp, for example, documents Buy Box analysis and discounts. M.E.R.C. A.I. analysis and the complete 3P Mercury sourcing-to-shipping workflow require a paid plan.
Competitor pricing checked September 28, 2026: SellerAmp pricing · AZInsight pricing. Plans, trial terms, and capabilities may change.
See the difference
More ways to find the real opportunity.
Real product views, focused on the decision each one helps you make. Open any image to see the full view.
Above the Buy BoxTest a higher selling price and its profit.
1-click deal stackingApply saved supplier savings to your real cost.
M.E.R.C. A.I. analysisPaid plans: another lens on the lead before buying.
FBA + FBM in one view
View full calculator image
Make saved deals count in one click
Apply supplier savings to the buy cost and see what the deal is worth after discounts.
Net cost: $38.81
View the coupon stacking setup
See the story behind today’s price
Use price, sales rank, and offer history to judge whether the margin has room to hold.
History, not a snapshot
View full market charts
Find the winning variation
Compare child products by size, color, price, profit, ROI, and offers.
Every child has its own math
View full variation analysis
Start in minutes
Free in three steps.
- 1
Create your free account
Sign up with email or Google. No credit card.
- 2
Add the Chrome extension
Install 3P Mercury from the Chrome Web Store and sign in.
- 3
Open any product page
The calculator appears on Amazon and Walmart product pages.
The calculator is forever free
When you’re ready, get the entire 3P Mercury stack.
Replace the patchwork of tools from sourcing to shipping. Find leads and suppliers, let A.I. analyze opportunities, track them with fresh data, then move the winners through purchasing, inventory, and FBA shipping.
- Auto Source lead finder
- Supplier discovery
- M.E.R.C. A.I. lead analysis
- Daily lead tracking
- Lead Vault and buy lists
- Wholesale catalog uploads
- Saved deals and live costs
- Purchase orders and receipts
- Warehouse bins and barcodes
- FBA shipments and prep centers
- Restocking workflow
- Financial and ASIN reporting
Get 30 days for $1
Then $89/month unless canceled. The calculator stays free.
Watch how 3P Mercury connects lead discovery, supplier sourcing, and A.I. analysis.
Questions
Free profit calculator FAQ
Is the profit calculator really free?
Yes. Create a free account and use the calculator at no cost. No credit card is required.
Does it work on Walmart?
Yes. The 3P Mercury extension adds the calculator to Amazon and Walmart product pages.
Can I compare FBA and FBM?
Yes. See FBA and FBM side by side, with profit, ROI, margin, maximum cost, and break-even.
What do I need?
Google Chrome on a desktop or laptop. Create your account, add the extension, and open a product page.
What comes with a paid plan?
M.E.R.C. A.I. lead analysis and the connected workflow from lead finding and supplier discovery through purchasing, inventory, and FBA shipments. Start with 30 days for $1.