Amazon FBA Calculator

The Amazon FBA Calculator estimates your real take-home profit on an Amazon sale after every seller fee is deducted. Enter your selling price, product cost, and shipping, pick a category, and instantly see net profit, profit margin, ROI, and a clear fee-by-fee breakdown — so you know whether a product is worth listing before you commit a single dollar to inventory.

The tool ships with 33 Amazon categories, each pre-loaded with its correct referral fee. Every rate stays fully editable in Fee Settings, so you can drop in your exact FBA fulfillment cost, closing fee, or any promotion-specific number.

Who It's For

Product Researchers

Validate a new product idea by checking the margin before sourcing inventory or placing a supplier order.

Active Sellers

Reprice existing listings with confidence by seeing exactly how a price change moves your net profit.

Private-Label Brands

Model landed cost plus referral and FBA fees to set a launch price that protects healthy margins.

How to Calculate Amazon FBA Fees

Enter Price & Costs

Type your selling price, your product cost (cost of goods), and any inbound shipping cost to Amazon's warehouse. These three numbers form the base of the profit calculation.

Pick the Category

Select your product category. The correct Amazon referral fee is applied automatically — and the category percentage is shown right next to its name in the dropdown.

Add Your FBA Fee

Open Fee Settings and enter your FBA fulfillment fee in the FBA / Closing Fee field. Look it up from Amazon's fee schedule using your item's size tier and weight, then drop the dollar amount in.

Read the Results

Net profit, margin, and ROI update live. The revenue bar and fee breakdown show how each dollar splits between cost, fees, shipping, and profit.

Every fee is editable. Tweak the referral percentage, FBA fee, or add a closing fee in Fee Settings to match your exact situation — the math recalculates instantly.

How Amazon's Fees Work

Referral Fees by Category

Amazon charges a referral fee on every sale — a percentage of the selling price that varies by category. The calculator pre-configures all 33 categories with tiered rates ranging from 5% to 20%. Here are some of the most common:

Category	Referral Fee	Notes
Electronics	8%	Also computers, cameras, cell phones
Home & Kitchen	15%	One of the largest categories
Clothing (>$20)	17%	Tiered: 5% (≤$15), 10% ($15–$20)
Jewelry (≤$250)	20%	Highest standard rate
Automotive	12%	Also industrial & scientific
Books, Music & DVD	15% +$1.80	Media items add a closing fee

Media closing fee: Books, Music & DVD, and Video Games carry an extra $1.80 closing fee per item on top of the referral fee. The calculator adds it automatically for those categories.

FBA Fulfillment Fees

If you use Fulfillment by Amazon, Amazon picks, packs, and ships your orders for a per-unit fulfillment fee based on the item's size tier and weight. Smaller, lighter items cost the least; oversize and heavy items cost much more. Enter this number in the FBA / Closing Fee field.

Size Tiers Drive Cost

Items fall into tiers such as small standard, large standard, and oversize. Fulfillment fees climb as dimensions and shipping weight increase.

Storage Is Separate

Monthly inventory storage is billed apart from fulfillment, with higher rates in Q4 and long-term fees for slow-moving stock past 271 days.

Instant Profit Analysis

Net Profit

Selling price minus product cost, shipping, and all Amazon fees — your real take-home per unit.

Margin & ROI

Profit margin as a share of revenue, plus return on investment against your cost of goods.

Visual Breakdown

A revenue bar splits each sale into cost, fees, shipping, and profit, with a line-by-line fee list.

Frequently Asked Questions

What is the Amazon referral fee?

The referral fee is a commission Amazon charges on each item sold, calculated as a percentage of the selling price. It varies by category — most categories are 15%, electronics is 8%, and jewelry can reach 20%. The calculator applies the correct rate the moment you pick a category, and you can override it in Fee Settings.

How are FBA fulfillment fees determined?

Amazon bases FBA fulfillment fees on your product's size tier (small standard, large standard, oversize, etc.) and shipping weight. Heavier and larger items cost more to fulfill. Look up your item's fee in Amazon's fee schedule and enter it in the FBA / Closing Fee field so it's included in your net profit.

Does the calculator include storage fees?

Storage is billed separately by Amazon, not per sale, so it isn't a default field. To factor it in, divide your expected monthly storage cost by the units you plan to sell and add that per-unit amount to the FBA / Closing Fee field. Remember Amazon raises storage rates in Q4 and charges long-term fees for inventory held beyond 271 days.

What is the $1.80 closing fee?

Amazon applies a fixed $1.80 closing fee per unit on media items — Books, Music & DVD, and Video Games — on top of the referral fee. The calculator adds it automatically when you select one of these categories, and it appears as a separate line in the fee breakdown.

How is ROI different from profit margin?

Profit margin is net profit divided by selling price — the share of revenue you keep. ROI is net profit divided by your invested cost (product plus shipping) — how hard your money works. A product can have a modest margin but a strong ROI if the cost of goods is low, which is why both numbers matter.

Can I edit the pre-filled fee rates?

Yes. Every rate in Fee Settings is editable — the referral percentage, payment processing, listing fee, and FBA / Closing Fee. Amazon updates its fee schedule periodically, so adjust the numbers to match the current rates or any category-specific promotion you qualify for.