---
title: "How are postage rates calculated, and are they discounted compared to UPS, USPS, and other retailers?"
url: "https://www.stamps.com/faq/how-are-postage-rates-calculated-and-are-they-discounted-compared-to-ups-usps-and-other-retailers/"
type: "faq"
modified: "2026-04-28T19:09:45+00:00"
---
Postage rates are calculated based on package weight, dimensions, destination, and service level. Stamps.com gives you access to discounted rates from major carriers, helping you save compared to standard retail pricing.