vootkit
Get Started FreeStart Free
Freelance & Business toolCalculated result

Amazon FBA Profit Calculator

Net profit, margin and ROI per unit after Amazon and FBA fees.

100% FreeRuns instantlyNo watermark
?
  1. 1Enter detailsAdd the numbers for your scenario.
  2. 2CalculateVootkit updates the result instantly.
  3. 3ReviewCheck totals, notes and breakdowns.
Private by designProcessed on your device where possible.
Works on any deviceDesktop, tablet and mobile browsers.
No installationOpen the page and start working.
Always free coreUse the free plan for everyday tasks.

How to use Amazon FBA Profit Calculator

Enter details

Add the numbers for your scenario.

01
Calculate

Vootkit updates the result instantly.

02
Review

Check totals, notes and breakdowns.

03
Use result

Copy the answer into your workflow.

04

Your files stay private

Your work is processed locally in your browser where possible and is never added to a Vootkit upload library.

Learn more about privacy
View all Freelance & Business tools
Break-Even PointUnits and revenue needed to cover fixed costs. Create a clean business result you can use right away. Freelance & Business Profit MarginMargin, markup and selling price from cost. Create a clean business result you can use right away. Freelance & Business VAT / GST CalculatorAdd or remove sales tax from any price. Create a clean business result you can use right away. Freelance & Business Percentage CalculatorPercent of, is-what-percent, and percentage change. Run the everyday calculation or conversion instantly. Everyday Invoice GeneratorBuild a clean invoice with line items and export a PDF. Create a clean business result you can use right away. Freelance & Business

The number that kills FBA businesses is not the product cost. It is the stack of fees between the sale price and what actually lands in your account, most of which are charged whether or not the unit sells.

What Amazon FBA Profit Calculator does

Takes your selling price and subtracts the referral fee, FBA fulfilment fee, unit cost, inbound shipping and any advertising or prep costs, to give net profit and margin per unit.

Margin is the figure to watch rather than profit. Two pounds of profit on a nine-pound item is a different business from two pounds on a forty-pound item, and only one of them survives an advertising cost increase.

The fees in the stack

Referral feeUsually 15% of the sale price; 8-17% depending on category
FBA fulfilmentBy size and weight tier — small changes in packaging can move the tier
StorageMonthly, and much higher October to December
Long-term storageCharged on units held beyond 365 days
ReturnsThe referral fee is largely refunded; the fulfilment fee often is not
AdvertisingNot a fee, but for most categories it is now a cost of being visible

Detailed steps

  1. Enter your selling price and landed unit cost.
  2. Set the referral percentage for your category — it is not 15% everywhere.
  3. Add the FBA fee from the size tier your packaging actually falls into.
  4. Put a realistic advertising figure into other costs. Zero is a fiction on almost every competitive listing.

Worth knowing

Check the dimensional weight tier before you finalise packaging. Fulfilment fees step up in bands, not smoothly, so a product a few millimetres over a boundary pays the next tier’s fee on every single unit for the life of the listing. Shaving the box down to drop a tier is often worth more per unit than a supplier renegotiation, and it is a one-off change rather than an annual argument.

Frequently Asked Questions

What margin should I aim for?

Most sellers treat 25-30% net as the floor for a product worth scaling, because anything thinner cannot absorb an advertising cost rise, a fee increase or a run of returns. Under 15% you are effectively working for Amazon and your supplier, and a single bad quarter removes the year’s profit.

Why is my actual payout lower than this figure?

Storage fees, returns, removal orders and advertising are charged separately from the per-unit fees and do not appear in a unit calculation. Reconcile against a real settlement report monthly — the gap between per-unit maths and the settlement figure is where most of the surprises in this business live.

Should advertising go in the cost?

Yes, in any category where organic ranking is contested — which is most of them. Take your total ad spend for a period, divide by units sold in that period, and enter that. A listing that is profitable before advertising and unprofitable after it is unprofitable, however the spreadsheet is arranged.

How do returns affect the numbers?

Amazon refunds most of the referral fee when a unit is returned, but the fulfilment fee is generally not recovered, and the unit may come back unsellable. In categories with double-digit return rates — clothing especially — you should model the return rate explicitly rather than treating each sale as final.

Is Amazon FBA Profit Calculator free?

Yes. The Vootkit free plan includes 5 tool runs a day. Upgrade to Vootkit Pro for unlimited daily use, an ad-free workspace and saved workflows.

Are my files uploaded?

No. Amazon FBA Profit Calculator runs entirely in your browser — your file is processed on your own device and never sent to a server. There is nothing for us to store or delete.

Do I need to install anything?

No. Amazon FBA Profit Calculator works in any modern browser on desktop, tablet or phone. Open the page and start.

How often can I use it? Is there a daily limit?

On the free plan you get 5 tool runs a day. When you reach the limit you'll see a prompt to upgrade, and it resets the next day. Vootkit Pro removes the cap entirely for unlimited daily use.

This tool processes everything locally in your browser. You can disconnect from the internet after the page loads and it will still work.