ShopFee — Fee & Profit Calculator for Online Sellers

Know your real profit per order — before you list.

ShopFee is a single-file profit calculator for online sellers. Enter your sale price and costs, and it shows net profit, margin, ROI and break-even price in seconds.

Built for

Etsy, Amazon FBA, eBay, Shopify, TikTok Shop, Gumroad and Payhip sellers.

Features

- Single-product profit breakdown: revenue, platform fees, payment fees, total costs, net profit, margin, ROI, break-even price, fee load.

- Batch mode: paste name, price, cost rows, calculate your whole catalogue, export CSV.

- Saved scenarios (per product line or marketplace).

- Copy summary / print to PDF.

- 7 platform presets + custom — every fee field editable.

- Works offline. No account, no ads, no tracking. Your data never leaves your device.

What's included

ZIP file with index.html (the calculator), README.md, batch-template.csv and LICENSE.txt.

Notes

Fee presets are approximate; platform rates change, so confirm them in your seller dashboard. No currency conversion. This is a calculator, not financial advice. Single-user licence — resale or redistribution not permitted.