Free Amazon & E-Commerce Tools

14 powerful calculators for Amazon and Shopify sellers. 100% free, no signup required.

Markup Calculator

Calculate markup percentage, selling price, and profit margin instantly. Convert between markup and margin.

Calculate your break-even point in units and revenue for any business.

Calculate FBA fees, profit margins, and ROI for any product instantly.

Calculate all Amazon seller fees including referral, FBA, and closing fees.

Estimate Amazon shipping and fulfillment costs for any product.

Calculate Shopify profit margins after all fees and costs.

Estimate shipping costs for your Shopify store orders.

Calculate all Shopify transaction and payment processing fees.

Calculate your true cost of goods sold including shipping, duties, and packaging.

Calculate your PPC return on investment and cost per acquisition.

Calculate ROI for your e-commerce business or product launch.

Calculate your return on ad spend across any advertising platform.

Compare fulfillment costs across FBA, 3PL, and self-fulfillment.

Estimate inbound shipping costs to Amazon fulfillment centers.