Dimensional Weight Calculator

Formula

Dimensional weight is the box volume divided by a carrier divisor:

dimensional weight = length × width × height / divisor

Divisor 139 is a common inch-to-pound domestic factor, 166 is a common international inch-to-pound factor, and 5,000 is a common centimeter-to-kilogram factor. Actual weight and dimensional weight are each rounded up to the next whole unit. The billable weight is the larger of those two. Cubic feet are on the shipping-volume page. Centimeter volumetric weight is on the volumetric-weight page.

Assumptions

• Length, width, and height use the unit in the measurement you select.
• The divisor is the one you select, not a live carrier contract.
• A whole number stays on that number. A fraction rounds up.

Worked example

A 12 by 12 by 12 inch box weighing 10 lb, at divisor 139, has a billable weight of 13 lb.

Input definitions

Divisor

The volume that counts as one pound or one kilogram. A smaller divisor makes a higher dimensional weight.

Actual weight

What the parcel weighs on a scale, before it is compared with the dimensional weight.

Limitations

Carriers can use a different divisor, a minimum charge, or a different rounding rule. This page does not price the shipment or look up a zone.

Questions