---
title: "Which factors determine shipping cost?"
url: "https://www.stamps.com/faq/which-factors-determine-shipping-cost/"
type: "faq"
modified: "2025-11-07T14:38:21+00:00"
---
Shipping costs are dynamic and depend on several key factors like package weight, dimensions, origin, destination, and the service level. If a shipper wants something delivered faster or if it requires a signature, the cost will increase. Use a shipping calculator to find the best rate.