Skip to main content
EconKit
Free · No signup · 2026 fees

Amazon FBA Calculator & Seller Tools for 2026

The full fee stack most sellers undercount — referral, FBA, storage, ads, returns — in one calculator, with category benchmarks and shareable result URLs. Plus every other tool an Amazon seller needs to price, source, and forecast profitably.

Open the FBA Calculator See all seller tools

Why most FBA profit estimates are wrong

Amazon takes six separate cuts from every FBA sale

Most sellers track three fees and get blindsided by the other three. The calculator models all six against your selling price so you see real unit margin before you commit inventory.

1

Referral fee

8–17% of selling price depending on category. The biggest line, and the one every seller knows about.

2

FBA fulfillment fee

Per-unit pick/pack/ship charge scaled by product size tier. Small-standard items cost ~$3.50; large-bulky can exceed $15.

3

Monthly storage

Per cubic foot — higher in Oct-Dec. Plus a long-term surcharge on anything sitting over 181 days.

4

Advertising

Sponsored Products + Sponsored Brands typically consume 10–20% of revenue in competitive categories.

5

Returns & refunds

Amazon refunds the customer but you paid inbound FBA. Return rates of 3–8% typical, up to 25% in apparel.

6

Inbound shipping

Getting inventory to Amazon’s warehouses. Per-unit cost varies by unit size and ship-from origin.

By category

Pre-configured calculators by Amazon category

Referral fees, typical FBA charges, and benchmark margins differ across Amazon categories. Each version below loads the calculator with category-specific defaults you can then customize for your product.

Which marketplace is right for you?

Marketplace profit calculators

Amazon isn’t the only option. Model each platform’s fee stack side-by-side so you can see which marketplace actually yields the best margin for your product.

Before you list

Price and cost-structure calculators

Get the inputs right before the FBA calculator runs. These model your landed cost per unit, your target selling price, and the margin you can actually defend.

Deeper reading

Amazon seller guides and benchmarks

The numbers behind Amazon profit margins, hidden seller costs, FBA versus FBM, and category-specific benchmarks.

Hidden Amazon Seller Costs That Most Profit Calculators Miss

Beyond referral fees and FBA fees, Amazon sellers face at least eight additional cost lines. Here is every one, what it costs, and how to model it.

How to Calculate Amazon FBA Profit: A Step-by-Step Breakdown

Walk through each fee line that sits between your Amazon selling price and your actual profit. Worked example with real numbers and a free calculator.

Amazon FBA Fees in 2026: The Full Cost Stack Most Sellers Undercount

Amazon takes six separate cuts from every FBA sale. Most sellers track three. Here is the full fee stack, what each one costs, and how to model real profit.

Amazon Seller Profit Margins by Category: 2026 Benchmarks

Realistic net profit margins for Amazon sellers across 12 product categories. Data-backed benchmarks to evaluate whether your margins are healthy or at risk.

FBA vs FBM: Which Amazon Fulfillment Method Is More Profitable in 2026?

Side-by-side cost breakdown of FBA vs FBM fulfillment. Compare fees, shipping costs, and real profit margins to choose the right model for your Amazon business.

Read the full Amazon seller profitability guide

Amazon FBA calculator FAQ

Frequently Asked Questions

Is this Amazon FBA calculator really free?

Yes. No signup, no limits, no credit card. Every calculation runs in your browser — nothing is logged, stored, or sold. You can share result URLs with clients or partners and they see the same numbers.

How accurate are the fees compared to Seller Central?

Defaults match published 2026 Amazon fee schedules for US marketplace: referral rates by category, FBA fulfillment fees by size tier, monthly storage fees for standard and oversize, and common advertising cost-of-sale ranges. You can override every fee for your specific product. The calculator shows the full fee stack — referral, FBA, storage, ads, returns — which Seller Central spreads across multiple screens.

What fees do most FBA sellers forget to include?

Three: (1) long-term storage fees for inventory sitting over 181 days, (2) advertising cost-of-sale (typically 10–20% of revenue for competitive categories), and (3) the return cost — Amazon refunds the customer but you still paid the inbound FBA fee and often can’t resell. The calculator models all three.

What is a good Amazon FBA profit margin?

Healthy private-label FBA sellers target 20–30% net margin after all fees. Thin commodity categories (phone cases, cables) often run 10–15%. Premium differentiated products can hold 30–40%. The calculator shows your margin against category benchmarks so you can see whether you’re priced competitively.

Should I use FBA or FBM for my product?

FBA wins on Buy Box priority, Prime eligibility, and operational scale. FBM wins on margin for heavy/bulky items and on control for low-velocity SKUs. A product doing >50 units/month in a standard size tier almost always profits more on FBA once the time-value of self-fulfillment is priced in. For the full tradeoff, see our guide on FBA vs FBM cost comparison.

Does this work for Amazon sellers outside the US?

Core fee logic is the same across marketplaces (referral %, FBA fee by size, storage, ads) but the exact rates differ. Current defaults match Amazon.com US. For Amazon UK, DE, JP, or other marketplaces, override the referral fee percentage and FBA fee with your marketplace’s published rates — the margin math behind it is marketplace-agnostic.