Retail catalogues are uneven. A scarf and a cast-iron pan ship for the same flat rate, and one of them quietly loses you money on every order.
WP EasyCart PRO stops the guessing. With Live carrier rates as your shipping method, checkout asks USPS, UPS, FedEx, DHL, Canada Post or Australia Post what the parcel really costs, from its weight, its size and the shopper’s address. Posting from the UK? Royal Mail joins them from its own card.

Weigh it. Quote it. Keep it.
Live rates are only as good as your catalogue. Give each product a weight and size under Package in its Shipping section. Miss one and the Summary column beside the editor warns you, before a customer finds out.
Then make the margin yours. A Handling fee covers boxes, tape and time. Swap any service for a fixed amount to round it or absorb part of it. Offer three or four services that clearly differ, not eleven look-alikes. Ship bulky items apart? Quote each item as its own parcel.
Last, test like a customer: your smallest order, a typical one and your heaviest. Shipping that matches the label is shipping that pays.
Where: WP Admin › EasyCart › Settings › Shipping settings › Carrier accounts, then Shipping rates. Plan: PRO or Premium. See every shipping feature.
WP EasyCart PRO
Charge what the parcel really costs.
The free trial unlocks live carrier rates on your own store, with payments, tax and documents in the same plugin. PRO is $119 a year or $14.99 a month, cancel any time. Rated 4.5 out of 5 by 200+ store owners on wordpress.org.