Amazon unit economics
Understand the real economics of any Amazon product. Calculate fees, costs, profit, margin, ROI, required investment, and payback before ordering inventory.
Stop guessing your profit

Calculate product costs, Amazon FBA fees, referral fees, logistics, advertising, and other expenses to see how much you can actually earn from each sale.
Mettra helps you calculate real profit, margin, ROI, and break-even before you invest.
Go beyond a simple profit estimate. Analyze investment, inventory costs, advertising, expected profit, and payback in one connected calculation.
Mettra combines both tools to show your full product economics.
See how much capital you may need, estimate order quantity, test different costs and prices, and understand when your investment can pay back.
Test the numbers before ordering inventory and avoid weak products.
Amazon profit calculator & financial model
Use Mettra’s Profit Calculator and Financial Model to calculate fees, costs, profit, margin, ROI, break-even, required investment, and payback — before you invest in inventory.

Enter a competitor ASIN and Mettra automatically pulls available product data to help build the financial model faster.

Choose how much market conditions can change during the forecast. Higher volatility means bigger possible changes in sales and price, helping you test how stable your product could be in less predictable conditions.

Mettra tests thousands of possible sales and price changes to show how your product may perform in different market conditions — from best case to worst case — and helps you spot cash-flow risks before you invest.

Save financial models in folders by product, niche, or project so you can keep all your Amazon launch calculations organized in one place.
How it works together
Price, fees, weight and size come straight from Amazon in the full tool.
Sign up free12-month financial model for these numbers
| 1 Mo | 2 Mo | 3 Mo | 4 Mo | 5 Mo | 6 Mo | 7 Mo | 8 Mo | 9 Mo | 10 Mo | 11 Mo | 12 Mo | |
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| Parameters | ||||||||||||
| Price* | — | — | — | |||||||||
| Units sold* | — | — | — | |||||||||
| Units ordered* | — | — | — | |||||||||
| Remaining stock | — | — | — | |||||||||
| Total | ||||||||||||
| Revenue | — | — | — | |||||||||
| Expenses | — | — | — | |||||||||
| Indirect Cost | — | — | — | |||||||||
| Inventory Costs $ | — | — | — | |||||||||
| Other Spends | — | — | — | |||||||||
| Begining balance | — | — | — | |||||||||
| Profit Margin | — | — | — | |||||||||
Want the full 12-month P&L, all months and charts?
5+Key Profit Metrics Calculated
Use Mettra’s Profit Calculator and Financial Model to check fees, margin, ROI, investment, and payback before you order inventory.
Get StartedCalculate product economics without building complex spreadsheets.

See what remains after Amazon fees, advertising, logistics, and product costs.
Understand how much capital you may need before launching.
Amazon sellers and experts about mettra.app
Quick answers about calculate profitability in Mettra.
Mettra helps Amazon sellers calculate product costs, Amazon FBA fees, net profit, profit margin, ROI, break-even, required investment, and payback before ordering inventory. Add your product cost, selling price, shipping, logistics, advertising, referral fees, and other expenses to see how much profit a product can actually generate. Build a model manually or start from a competitor ASIN, test different prices and costs, and compare scenarios in one place. The Profit Calculator and Financial Model help you avoid spreadsheet errors, understand real unit economics, and make faster launch decisions with less risk.