Precise shipping rate calculations, including box packing, nested items, quantity discounts, free shipping, multiple origins, and more.

Take full control of your store’s shipping logic with

eShipRate

, the most customizable and intelligent shipping engine available for BigCommerce.

Automatically calculate rates based on:

• Combined product dimensions

• Product groups and categories

• Multiple shipping origins

• Flat-rate logic (including

UPS® Simple Rate

and

FedEx® One Rate

)

• Quantity-based discounts

• Per-box item limits

• Hazardous materials

• International duties and taxes

• And more.

eShipRate includes smart box-fitting logic to ensure items will actually fit in flat-rate boxes, helping you confidently offer

UPS Simple Rate, FedEx One Rate

, and similar methods without guesswork.

For heavier orders, eShipRate automatically splits shipments to avoid carrier surcharges—like 50lb weight limits—helping you keep rates low and competitive.

Supports real-time rates from

UPS, FedEx, USPS

, and nearly any global carrier offering live rate APIs.

Tailored customizations are available to meet your store's exact needs.

No long-term contracts. U.S.-based phone support.

Just powerful automation, reliable service, and complete control over your shipping strategy.