Shipping Dimensional Weight Calculator

Calculate dimensional (volumetric) weight and billable weight for parcels in inches/lb or cm/kg.

Common divisors: 139 (UPS/FedEx daily rates, in/lb), 166 (USPS, in/lb), 5000 (most international, cm/kg). Carriers round dimensions and weight up; check your carrier's current rules.

How to use

  1. Choose units and enter box dimensions.
  2. Enter actual weight and your carrier's divisor.
  3. Billable weight is the greater of actual and dimensional weight.

FAQ

What is dimensional weight?

Volume ÷ divisor. Carriers charge by it when a box is large but light.

How do I reduce it?

Use the smallest box that fits and avoid excess void fill.