Dimensional Weight Calculator
Avoid unexpected shipping surcharges. Calculate your package's volumetric weight across all major carriers using the latest 2026 divisors (139 and 166).
01Package Details
What is Dimensional Weight?
Dimensional weight (DIM weight) is a pricing technique used by commercial freight services (including courier and postal services) which uses an estimated weight that is calculated from the length, width, and height of a package.
Carriers like UPS and FedEx calculate shipping costs based on the greater of the actual weight or the dimensional weight. If your package is light but large, you will be billed for its volume rather than its mass.
How to Calculate It
The standard formula used by most carriers is:
The divisor is set by the carrier. For 2026, the standard divisors are 139 for most commercial shipments and 166 for retail or international shipments.