Free E-commerce Tools & Calculators

Professional tools to help you optimize your e-commerce business. Calculate fees, analyze performance, and make data-driven decisions.

No registration required. Start calculating in seconds.

Calculate total Amazon FBA fees including referral fees, fulfillment fees, and storage costs.

Estimate eBay selling fees including final value fees, payment processing, and listing fees.

Measure how efficiently your inventory is moving with our turnover ratio calculator.

Calculate return on investment for your reselling business across all platforms.

Find your break-even point and understand minimum pricing for profitability.

Calculate total inventory value using FIFO, LIFO, or weighted average methods.

Why Use Our Tools?

Our calculators reflect the latest fee structures and policies from all major platforms.

No hidden fees, no registration required. Use all tools completely free.

Built by e-commerce experts with real-world selling experience.

Get access to automated calculators, bulk processing, and real-time data with Omni Inventory.