Subject: My US comparison
From: Subir Chakma <[email-masked]>
To: Ibrahim Usmani <[email-masked]>
Date: Sun, 7 Jul 2013 10:23:03 +0530 (IST)

Dimensional Weight 

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All international carriers base their shipping rates on the greater of Actual Weight and Dimensional Weight. Actual Weight is the weight of the package when put on a scale. Dimensional Weight is based on the size of the package. Large items that have a small Actual Weight, like pillows and lamp shades, will have a larger Dimensional Weight. 

Dimensional Weight is calculated by multiplying the Length by Width by Height and dividing the total by a "DIM Factor." The industry standard DIM Factor is 139. So, the formula is: 

Dimensional Weight (pounds) = Length x Width x Height (inches) / 139 

For Example: 

A 10" x 12" x 15" box with an Actual Weight of 3 lbs has a Dimensional Weight of 11 lbs: 

10 x 12 x 15 / 139 = 13 lbs 

Rgds Subir