Know your true numbers before you list. Enter your product details and get a full profitability breakdown - net profit, margin and ROI - with a verdict on whether the product is worth selling.
Profit Margin
46.1%
ROI
192%
The calculator grades every product against the same four bands. They are set where they are because margin has to survive advertising, and under 15% there is not enough left to buy traffic.
| Net margin | Verdict | What to do about it |
|---|---|---|
| Below 0% | Negative margin | Review pricing or reduce costs before listing. |
| 0 - 15% | Thin margin | Limited room to run ads profitably. |
| 15 - 25% | Moderate margin | Viable with tight ad spend management. |
| 25% and above | Healthy margin | Strong product candidate. |
What you keep
01Net profit = Selling price − all costs and fees
What actually lands in your pocket after every cost and fee is deducted from the selling price. This is the number that should reconcile against your settlement report, not the gross margin from your sourcing sheet.
Share of price
02Margin = Net profit ÷ Selling price
Net profit as a percentage of the selling price. It tells you how much of each sale you keep, and it is the figure that decides whether the product can absorb ad spend, returns and a fee increase without going underwater.
Return on capital
03ROI = Net profit ÷ Total investment
Total investment is product cost, shipping, prep and other costs - the cash you actually commit per unit. Amazon's fees are excluded because they come out of revenue rather than out of your pocket up front. ROI is the number that decides whether to place the purchase order.
Where margin goes to die
04Billable weight = max(unit weight, L × W × H ÷ 139)
Amazon bills on whichever is greater, so a light product in an oversized box is charged for the box. Shrinking packaging is often the cheapest margin improvement available, because it can move both the weight band and the size tier at once.
This page assumes you already know what Amazon deducts. If a fee line looks wrong, or you want the derivation behind the referral rate and the size tier, the FBA revenue calculator tears down the same sale fee by fee.
Knowing your FBA fees is step one. Turning that into consistent, growing profit - across ads, creatives, inventory and operations - is where most sellers lose ground. Xneeti runs your entire Amazon account on AI, around the clock, so every dollar works harder.
~50% average TACoS reduction~30% average revenue growthFlat fee, never a percentage of ad spend1-day onboarding · 4.8 on Google
Most experienced sellers target 20-40% net after all FBA fees. Below 15% leaves very little room to run PPC profitably. Above 40% is excellent - it means you have pricing power, a cheap supply chain, or both. The right number depends on your category: high-volume consumables can work at 18-22%, while low-volume premium goods need 35% or more for the economics to hold.
Every product is assigned a size tier from its dimensions and weight - Small Standard, Large Standard, Large Bulky or Extra Large. Each tier has a per-unit fee covering pick, pack and shipping to the customer. This calculator detects the tier from what you enter. Oversized products carry substantially higher fees, which is why measuring accurately before you source matters.
It is Amazon's commission on every sale - a percentage of the selling price, charged for providing the marketplace. The rate varies by category, typically 15% for most, as low as 6% for books and up to 17% for jewelry. It is calculated on the total selling price. The category selector applies the correct rate for you.
Amazon charges more per cubic foot from October through December to manage warehouse capacity through the holiday peak. The standard rate is $0.87 per cubic foot per month; in Q4 it rises to $2.40 - nearly three times higher. Overstocking in October costs you considerably more than overstocking in March, which is why the period toggle is worth using before a holiday buy.
No, and that is deliberate. PPC costs vary enormously by category, keyword competition and campaign structure, so building in a fixed figure would produce a misleading number. For a complete picture, take the net profit here and subtract your average ad cost per unit sold - total ad spend divided by units sold. As a benchmark, a healthy ACoS for most categories falls between 15% and 25%. If your margin before ads is under 30%, running profitable PPC gets difficult.
Margin measures net profit as a share of the selling price - how much of each sale you keep. ROI measures profit against what you invested - how hard your capital is working. A product at 30% margin and 200% ROI means you keep 30 cents of every dollar sold and earn back twice what you spent to source and sell it. Both matter: margin determines whether the SKU is sustainable, ROI determines how fast you can reinvest.
Look at the split bar. If Amazon's block dominates, the lever is either category placement or size tier - check whether dimensional weight is billing you for air. If your own costs dominate, it is landed cost or freight. Price is the fastest lever but the one competitors respond to; packaging is the slowest but nobody can take it back from you.