Seller Calculators

Know Your Real Profit Before You Sell

Free fee calculators for Amazon, Shopify, Etsy, eBay, and 7 more marketplaces. Stop guessing your margins. Calculate your exact fees and profit per sale.

Know your cash cushion: try the Sleep Well Number calculator.

How It Works

Three steps to understand your real profit

Step 1

Pick Your Marketplace

Choose from 11 major ecommerce platforms including Amazon, Shopify, Etsy, eBay, and more.

Step 2

Enter Product Details

Input your product price, cost of goods, and shipping cost. Select a category if applicable.

Step 3

See Your Real Profit

Get an instant breakdown of all marketplace fees, your net profit, and profit margin percentage.

Amazon FBA fee toolkit

Go Deeper on Amazon Fees

Referral fees are just the start. These calculators cover the FBA charges that hide in your settlement reports.

FBA Storage Fee Calculator

Monthly cubic-foot charges, the Q4 rate jump, and aged inventory surcharges after 180 days.

Calculate

Inbound Placement Fee Calculator

Compare minimal, partial, and Amazon-optimized shipment splits before you build a shipping plan.

Calculate

FBA Reimbursement Calculator

What Amazon owes you for lost or damaged inventory, and the profit gap reimbursements never cover.

Calculate

Tired of Manually Tracking FeesAcross Marketplaces?

Futureproof books every order, fee, and payout into one ledger: real margin per SKU and channel, settlements reconciled, books done. Six AI agents plus a monthly human specialist review, starting at $1,000/month.

Margin Matters

The platform news, read for your margin

Twice a month: the changes that touch your P&L, the money behind each one, and one move to make. Three minutes, then back to work.

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