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Amazon's FBA Revenue Calculator — and the number it never gives you

It is free, it works without a login, and it is the right place to get your fees. It also stops at margin — which is one step short of the decision you are actually making.

Use Amazon's calculator first. Genuinely.

Amazon publishes the live referral and FBA fee tables, and its own calculator reads from them. Nothing on this site copies those tables, because a copy goes stale silently and you would price a product on it. Get your fees from the source: the US calculator or the UK one, which Amazon runs separately because the fee schedule and VAT rules differ.

What it actually calculates

You give it dimensions, weight, category and price — or just an ASIN — and it returns referral fees, fulfilment costs, storage, net profit per unit and margin, with FBA compared against fulfilling yourself. That is a real, useful answer, and it is free without an account.

Where it stops

1. It does not model advertising at all

Not ACOS, not ad spend, not cost-per-click. Its inputs and outputs are fees and margin. So it will tell a seller their unit clears £6 of profit and say nothing about whether they can afford the £1.40 click it takes to sell one.

That is not an oversight on Amazon's part. Amazon has no commercial reason to build the tool that tells you to spend less on Amazon Ads.

2. For UK sellers, it does not take VAT off your price

It accounts for digital services tax inside referral fees, and referral fees are charged on the total sales price. But your £30 sale price is not £30 of revenue if you are VAT registered — at the 20% standard rate you keep £25.00 and remit £5.00 (GOV.UK rates: 20% standard, 5% reduced, 0% zero-rated).

A UK margin read straight off the tool is overstated by exactly that amount. On a thin product that is the difference between a viable ASIN and one that quietly loses money on every advertised sale.

The number that actually decides your bid

Margin is not the decision. The decision is what you can pay for a click, because that is the unit a bid is set in. Two products with identical margins have completely different maximum bids if one converts at 12% and the other at 4%.

That chain — margin, then break-even ACOS, then max CPC — is the part no fee calculator does. Ours does only that part:

The rest of Amazon's free toolkit

  • Fee and pricing estimator — compares fulfilment methods
  • Product Opportunity Explorer — units sold and average price by niche; needs a selling account
  • Inventory tools — stock monitoring inside Seller Central

All free, all worth using. None of them touches what a click is worth to you.

Questions people actually ask

Yes, and you do not need a selling account to use it. Amazon states it can be used as a guest without signing in, as well as from inside Seller Central on either selling plan.
No. Its documented inputs are product dimensions, weight, category and price, and its outputs are referral fees, fulfilment costs, storage, net profit per unit and margin. Advertising, ACOS and cost-per-click appear nowhere in it. This is the single biggest gap for anyone already running Sponsored Products.
Not in the way most sellers assume. It accounts for the digital services tax within referral fees, and referral fees are calculated on the total sales price — but it does not strip VAT out of your sale price to show what you actually keep. A UK margin read straight off the tool is therefore overstated by the VAT you will remit.
Yes. The UK runs on a different referral fee schedule, different VAT obligations and a different FBA fee tier structure, and Amazon runs it at a separate European address. Using the US tool for a UK ASIN gives you the wrong fees.
The fee and pricing estimator for comparing fulfilment methods, and Product Opportunity Explorer inside Seller Central, which needs a selling account and reports units sold and average price for a niche.