postcalc.usps.com

postcalc.usps.com is the official USPS postage calculator tool, which allows users to calculate shipping costs for various USPS services. By entering the package’s dimensions, weight, and destination, users can get an estimate of the shipping cost for services like Priority Mail, First Class, and more. This tool is useful for businesses and individuals looking to compare shipping options and choose the most cost-effective method for sending packages.