Smarter eCommerce decisions start with accurate numbers.

An eCommerce profit calculator combines selling price with product, shipping, fulfilment, payment, marketplace, advertising, returns and tax costs to estimate net profit. It gives sellers a clearer view than revenue alone and makes product comparisons more consistent.

Marketplace fees reduce the revenue left after a sale. Amazon referral fees, eBay final value fees, Etsy listing fees and Shopify payment costs use different percentage and fixed-fee structures, so their impact changes with the product price, category and order value.

ROI compares net profit with the money invested in inventory and operating costs. Calculating it before listing helps sellers compare opportunities, protect working capital and avoid products that look attractive only at revenue or gross-margin level.

Profit margin compares net profit with sales revenue, while ROI compares net profit with the money invested. A product can have a healthy margin but a weaker ROI when inventory, fulfilment or customer-acquisition costs require more capital.

The break-even price is the selling price where revenue covers all included product, shipping, fulfilment, tax and marketplace costs, leaving approximately zero profit or loss. It provides a useful pricing floor for promotions and advertising decisions.

Marketplace fees, currencies, tax treatment, payment charges and fulfilment costs vary by platform and country. Selecting the right combination applies more relevant assumptions, while Advanced mode lets sellers replace preset estimates with their actual rates.