Typical Paid Calculator
$20–$50 / month
Another subscription just to make routine sourcing decisions.
- Basic profit calculations
- Monthly recurring charge
- Separate tools for other tasks
Free forever basic calculator
The Best Profit Calculator on the Market Is Free.
Why are you paying for yours? Get a powerful free Amazon profit calculator and free Walmart profit calculator with profit, ROI, margin, break-even, fee estimates, sales data and competition analysis—all inside one fast Chrome extension.
No credit card required. Create your account and use the calculator immediately.
Amazon & Walmart
Fast ROI calculations
Saved leads
Seller analysis
$0100% FREE
Profit + ROI + Margin
Amazon Fee Estimates
Walmart Profit Analysis
Competition & Sales Data
Stop Paying
A Better Amazon Profit Calculator Should Not Cost ANYTHING.
Basic sourcing math is essential. It should not be locked behind another monthly subscription. 3P Mercury gives Amazon and Walmart sellers a professional calculator at no cost.
3P Mercury Free Account
$0 / month
Register once and start evaluating Amazon and Walmart products immediately.
- Profit, ROI and margin
- Maximum cost and break-even
- Amazon and Walmart support
- Saved leads and seller analysis
What You Keep
100% of your savings
Put the money toward inventory instead of another calculator subscription.
- More capital for sourcing
- Faster buy decisions
- One connected workflow
Built for marketplace sellers
Everything You Expect From the Best Amazon Profit Calculator
Evaluate products quickly, understand your numbers and save promising leads without bouncing between multiple tabs and disconnected tools.
Profit, ROI & Margin
Enter your buy cost and selling price to instantly estimate profit, return on investment and margin.
Marketplace Fee Estimates
Account for Amazon or Walmart marketplace fees and shipping costs before you purchase inventory.
Break-Even & Maximum Cost
Know the highest price you can pay and the lowest price you can sell while protecting your target profit.
Sales & Price Data
Review sales rank, offer counts, price history and estimated monthly sales in the same workflow.
Save Profitable Leads
Store promising Amazon or Walmart products in your lead database so you can return to them later.
Instant Buy-Rule Feedback
See which sourcing rules pass or fail, including profit, risk, velocity, Amazon presence and product restrictions.
Seller Competition Analysis
Review FBA and FBM sellers, stock quantity, price, rating, condition and delivery speed.
Custom Fees & Targets
Adjust fees and set target ROI or profit values to match the way your Amazon or Walmart business operates.
Use It Immediately
Create a free account, install the Chrome extension and start calculating products in minutes.
See the free calculator in action
Make Faster Amazon and Walmart Sourcing Decisions
The calculator combines the numbers that matter most with product, sales and competition data.
Profit calculator
See the Complete Deal, Not Just One Number
Compare FBA and FBM scenarios, calculate profit and ROI, factor in shipping, set target profit rules and review key Amazon sales data without leaving the page.
- FBA and FBM calculations side by side
- Profit, ROI, margin and break-even
- Sales rank, offer count and price data
- Custom fees and target profit settings
Lead management
Save Good Leads Before They Disappear
Keep profitable product ideas organized with pricing, profit, ROI, margin and fulfillment details. Your research stays connected to your sourcing workflow.
Competition analysis
Understand Who You Are Competing Against
Analyze FBA and FBM seller counts, stock, pricing, seller ratings and delivery estimates before you commit cash to a product.
Decision support
Know Why a Product Passes or Fails
Get clear feedback based on your sourcing rules. The score highlights profit, risk, velocity, restrictions and other important deal-breakers.
Start in minutes
How to Use the Free Amazon & Walmart Profit Calculator
No demo call, no payment information and no waiting period.
1
Create Your Free Account
Register through 3P Mercury. You do not need a credit card to access the free calculator.
2
Install the Chrome Extension
Add the 3P Mercury extension from the Chrome Web Store and sign in to your account.
3
Calculate Your Next Product
Enter your cost and selling price, review the results and save profitable leads immediately.
Common questions
Free Amazon & Walmart Profit Calculator FAQ
Is the 3P Mercury Amazon profit calculator really free?
Yes. The basic calculator is available with a free account. No credit card is required to register and start using it.
Does the calculator work for both Amazon FBA and FBM?
Yes. The interface can compare FBA and FBM calculations, including estimated profit, ROI, margin, maximum cost and break-even price.
Can I use 3P Mercury as a Walmart profit calculator?
Yes. 3P Mercury supports Amazon and Walmart seller workflows, so you can evaluate marketplace profit before purchasing inventory.
Do I need to enter a credit card?
No. A credit card is not required for the free account.
Does the free version include every 3P Mercury feature?
No. The free account provides the basic calculator experience. Advanced workflow features, premium data and customer support may require a paid 3P Mercury plan.
What information can the calculator show?
Depending on the marketplace and available data, it can show profit, ROI, margin, maximum cost, break-even price, fees, sales metrics, offer counts and seller competition.
Why Pay for a Profit Calculator When the Best One Is Free?
Create your 3P Mercury account now and start using the free Amazon and Walmart profit calculator immediately.