ABOUT

About this site

Seller Logistics Calculator provides free tools that help online sellers estimate shipping and fulfillment figures before dispatch.

Tools built for practical decisions

We explain each formula, its assumptions and its limitations so results can be used as informed estimates rather than guaranteed carrier quotes.

Editorial principles

We review formulas and reference data regularly, correct reported errors and clearly state when carrier measurements or contract terms take precedence.

Last updated: August 11, 2026