About
Tools for practical seller decisions
Last updated: June 2, 2026
Ecom Profit Tools is a free calculator website for ecommerce sellers, marketers, and small business owners who need quick estimates before making pricing, fee, margin, inventory, or advertising decisions.
Our calculators help estimate profit, marketplace fees, profit margin, markup, return on investment, advertising return, and break-even sales. Calculations happen directly in your browser and do not require a login.
The site is built for Shopify store owners, Etsy sellers, Amazon and eBay marketplace sellers, TikTok Shop merchants, WooCommerce operators, and sellers comparing payment options such as PayPal and Stripe.
Results provide general educational estimates only. Actual fees, shipping charges, tax treatment, advertising attribution, and business costs vary. Always verify important inputs and decisions using current records and appropriate professional guidance.
How the content is maintained
Calculator pages are written around formulas, example inputs, common seller mistakes, and plain-language notes about where estimates can differ from real invoices or marketplace statements.
Fee-sensitive pages include review notes where platform terms may vary by country, category, account type, currency, or seller settings. When a calculator covers third-party marketplaces or payment processors, it is not presented as an official statement from those platforms.
Corrections and update requests can be sent through the contact page. We review reports about unclear formulas, outdated fee assumptions, broken links, and content that needs stronger sourcing or examples.
Review and correction process
Calculator pages are reviewed when new fee-sensitive content is published, when platform terms appear to change, or when a user reports an issue. Updates may include clearer assumptions, better examples, source links, or corrected explanatory text.
If you believe a formula explanation, fee assumption, source link, or calculator label needs review, send the page URL and the specific issue through the contact page. We prioritize corrections that could materially affect seller decisions.
Independence
Ecom Profit Tools is not an official calculator, partner site, or representative of Shopify, Etsy, Amazon, eBay, PayPal, Stripe, TikTok, WooCommerce, Meta, Google, or any other marketplace, payment processor, advertising network, or ecommerce platform mentioned on the site. Platform names are used to identify seller workflows and fee categories that readers may need to verify in their own accounts.