About USPS Shipping Calculator
The USPS Shipping Calculator is the ultimate free tool for estimating postage rates for 2026. Whether you are an eCommerce seller or shipping a gift, our tool helps you compare prices between Ground Advantage, Priority Mail, and Priority Mail Express.
Zone Based
We calculate zones based on Origin and Destination zip codes to give accurate estimates.
Weight Accurate
Enter pounds and ounces precisely to ensure you don't overpay for postage.
Save Quotes
Keep a history of your shipping estimates and export them to CSV instantly.