UPS has established specific size and weight limits for the packages that you can send with all UPS services. The restrictions listed below pertain to individual packages. There are no limits to the total overall weight of your entire shipment or the total number of packages in your shipment. Shipments larger than the limits listed below will require the use of a freight service.
UPS requires that you attach a heavy package sticker to all your packages that weigh more than 70 lbs. These stickers alert UPS employees and your customers that they should be careful when handling.
Understanding dimensional weight on ParcelPath
To calculate dimensional (DIM) weight, multiply the length, width, and height of a package, using the longest point on each side. Then, divide the cubic size of the package in inches by the DIM divisor to calculate the dimensional weight in pounds.
Package is 30x12x12 or Length = 30 inches, Width =12 inches, Height = 12 inches. Multiply 30x12x12 = 3,320 divided by DIM divisor of 166 = 26.02. You would need to round this up to 27 lbs. Based on the dimensions of the box regardless of the actual weight of the box, UPS calculates the dimensional weight at 27 lbs.