What is the Lite plan?

The $10/mo Lite package lets you try the core AI & keyword tools, and you can cancel anytime. Paid plans include a 30-day money-back guarantee.

Which marketplaces do you support?

This free calculator models Amazon US fee rules. The full platform covers 20 Amazon marketplaces plus Walmart, Etsy, TikTok Shop and Trendyol.

Are the figures I type stored?

No. This tool needs no signup and the maths runs in your browser — none of the fields you type are sent to a server or stored anywhere.

Which plan do I need?

Starter is enough to get started. Check Pro or Business plans for more features and limits.

Where does the FBA fee come from?

From Amazon's published US rate card — derived from the size tier and weight, plus the fuel and logistics surcharge in force. We also print the date the card took effect: a rate that changes your decision has to be datable.

Should I look at margin or ROI?

They answer different questions. Margin says how much of the sale price stays with you — a pricing decision. ROI says how hard your tied-up cash works — an inventory decision. Here the ROI denominator is the investment this tool actually asks for — product cost + shipping — and that figure is printed on screen under the ROI, so you can check it. Other calculators often divide by total cost instead, which is why the same product can show a different ROI there.

Does this include a return rate?

NO — this free calculator has no return-rate field and returns are not modelled, so the margin you see is the best case in which NOTHING comes back. We say so plainly because the gap is large: a return does more than cancel the sale — part of the referral fee is not refunded, the unit is often unsellable afterwards, and the round-trip shipping comes out of your pocket. In apparel 20–35% is common. Use the free Return Cost calculator, or the dashboard, to price returns in.

What if I enter a VAT-inclusive price?

In VAT-inclusive markets (EU/UK/TR) commission and fees are charged on the VAT-EXCLUDED amount. Entering a gross price inflates both revenue and fees by the VAT, so the margin reads high — at 20% VAT the error is roughly half again. That is why the marketplace selector sets VAT treatment even when you type the fees manually.

💵Profit Calculator

Know your real profit margin.

Amazon referral fee, FBA fee, shipping cost, product cost — calculate your net profit margin with four line items on one screen (product, inbound shipping, the FBA fee and the referral fee).

Calculate Profit All free tools →

This calculator is free — no signup needed

Line items

$0.30

Referral floor

Tool cost

Amazon FBA profit & ROI result — monthly revenue, total costs, monthly profit and ROI on investment, calculated from a measured product.

💵 Quick Profit Check

LIVE

Sale price ($)

Product cost ($)

Shipping per unit ($)

FBA fee

Unit system

Packed weight (lb)

Length (in)

Width (in)

Height (in)

Derived FBA fee: $4.60

Fuel & logistics surcharge: +$0.16

FBA fee used in the maths (base + fuel): $4.76

Size tier: large_standard · Billed weight (lb): 0.78

Dimensional weight WON: you are billed on the size-derived weight, not your actual weight.

Amazon category · picking one fills the referral rate from that category's tier AT THIS PRICE — you can still edit it

Referral fee (%) · 15% is typical for most categories

Category · the minimum fee and the closing fee depend on the category

ⓘ This models the Amazon US rule set: a US$0.30 minimum referral fee and a US$1.80 per-unit closing fee on media. That is why the figures are in USD — compare with your own marketplace's rate card (Amazon UK £0.25, the EU €0.30, amazon.com.tr publishes no minimum).

ⓘ Fee source: Amazon US rate card, effective 2026-01-15; the non-peak card runs through 2026-10-14. The 15 Oct–14 Jan PEAK card is SEPARATE and not modelled. The fuel surcharge (3.5%), apparel/hazmat uplifts, storage and inbound freight are NOT included.

ⓘ Rounding: money lines are rounded to the nearest cent, and the total on screen is the sum of the lines on screen. The marketplace's own rounding can differ by a cent per line; in tiered rate cards the direction of that difference is not guaranteed.

Net profit / unit$8.78

Margin: 35.1%ROI: 114%Referral fee: $3.75

ROI denominator — investment (cost + shipping) = $7.70

This quick estimate excludes storage, returns, the selling plan and the 3.5% fuel surcharge — the dashboard counts all of them, so its net profit comes out lower.

Inputs are stored only in your browser, and the link carries the calculation itself.

Auto-calculate with real Amazon fees → sign up

Inside the dashboard

The same math, with the numbers that decide.

The free calculator above works out a single unit. The dashboard turns the same inputs into your break-even price, your supplier ceiling, your break-even return rate and the weight where FBA takes over — on live USPS rates and Amazon's fee schedule.

The Profit Calculator in the Seller Niche dashboard: net profit per unit, profit margin, ROI and decision numbers

Create a free accountNo card required

Data sources

Where these numbers come from.

Every fee, volume and rank in the calculator traces to a source. All of them are listed here — and where we estimate, we say so.

🏪Amazon SP-API (Official)

Certified SP-API Partner

We are a certified Amazon Selling Partner API integration. Product catalog, search volume, keyword rankings, buy box data, review counts, and seller inventory signals come directly from Amazon's official API under our registered developer credentials. This data carries Amazon's own quality guarantees.

📈Keepa Data Feed

Keepa API Integration

Historical BSR trends, price history, and long-run sales rank data are enriched through the Keepa API — the industry's most trusted independent ASIN tracking network, tracking 1B+ ASINs since 2013. This gives us 5+ years of time-series data per product, enabling BSR seasonality detection and anomaly filtering.

⚙️Proprietary Index

Daily recalculation

Category opportunity scores, niche competition indices, and cross-marketplace trend signals are generated by our own processing pipeline. These composite scores combine SP-API signals, Keepa trends, and category-level sell-through rates, recalculated daily. Every composite metric displays its component inputs so you can audit the logic yourself.

🛒Rainforest API

Live page API

Real-time Amazon page scans power Buy Box tracking, listing-hijacker alerts, wholesale GTIN matching and TikTok Shop cross-verification.

⚡RapidAPI

Amazon search fallback

Amazon Search and Product Finder fallback across 17 marketplaces, plus wholesale ASIN matching and trend-keyword products.

🕸️Oxylabs

Live page scan

Large-scale live page scraping for Amazon marketplaces and supplier-record synchronization.

🔎SerpApi

SERP API

Live search-engine results pages drive Cerebro/Key-Spy SERP analysis, index checking, keyword rank tracking, the A+ content kit and subcategory market data.

📊DataForSEO

Search volume API

Measured keyword search volumes, keyword enrichment and reverse-ASIN volume for Amazon marketplaces.

🔤MerchantWords

Search volume

Amazon search-volume data across Cerebro, Search Volume, Trend, Key-Spy and Reverse ASIN tools.

🚢ImportYeti

Customs import records

US customs import records and supplier discovery — who ships what, from where, and to which buyer.

🎵Kalodata

TikTok Shop data

TikTok Shop product and trend data powering TikTok research, trending and the product harvest pipeline.

🎬FastMoss

TikTok Shop analytics

TikTok Shop insights — competitor, research, trending and influencer analytics.

📹Apify

TikTok video scraping

TikTok video scraping for Creator Discovery, TikTok-to-Amazon signal and trending content.

🧶Etsy Open API

Etsy official API

Etsy's official API powers the Etsy tool pack — Key-Spy, Shop Analyzer, Research and Trends.

Methodology & freshness table →

The problem

Why you need this tool.

Real profit calculation with the FBA fee and the referral fee you enter

🪙

The floor fee on cheap units

Amazon charges at least $0.30 in most categories, but NOT in media, grocery or gift cards. Guessing wrong moves the profit in either direction.

📀

The media closing fee

On books, DVDs, music, software and video Amazon takes another $1.80 per item — on a cheap DVD that can turn profit into loss.

📐

ROI or margin?

Margin divides profit by the PRICE, ROI by the INVESTMENT. Mix the denominators up and the same product shows two different 'right' numbers.

Features

Everything in one platform.

⚡

Instant results

Get results in seconds, no more waiting.

📊

Detailed analysis

Make right decisions with in-depth data analysis.

🌍

US fee rules

This calculation follows Amazon US rules: the $0.30 referral floor and the $1.80 media closing fee are US-specific.

🔒

Nothing leaves your browser

The maths runs in your browser — nothing is sent while you calculate. Only if you use the form under the result to email it to yourself do that result and your address reach us.

📱

Mobile friendly

Responsive design that works perfectly on any device.

🔄

One ROI definition

ROI = profit / INVESTMENT (product + inbound) — the same definition as the dashboard; the denominator never changes.

How it works?

1️⃣

Type price and costs

Sale price, product cost and inbound shipping per unit — no signup, the calculation runs instantly.

2️⃣

Type the FBA fee and referral rate

Referral is 15% in most categories. On a cheap unit Amazon's $0.30 floor can apply — the tool says so on screen when it does.

3️⃣

See net profit, margin and ROI

ROI is profit over the INVESTMENT (product + inbound shipping) — the same definition as the dashboard calculator, so the DENOMINATOR never changes. The dashboard also charges storage, returns, the selling plan and the fuel surcharge to net profit, so its ROI comes out lower.

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