---
title: "How do I calculate domestic postage costs?"
url: "https://www.stamps.com/faq/how-do-i-calculate-domestic-postage-costs/"
type: "faq"
modified: "2025-10-28T21:17:28+00:00"
---
Our rate advisor feature helps you calculate exact postage or shipping rate for anything you send. All you need is your item’s weight and dimensions — we do all the math for you and recommend cheapest, fastest, and best rates across all carriers.