How to Determine Billable Weight

If your package has a large size-to-weight ratio, you should consider your package's dimensional weight when you calculate your shipping rates.

Determine the Actual Weight

First, use a scale to determine the weight of the package. Round any fraction of a pound or kilogram to the next whole pound or kilogram for all packages.

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Determine the Dimensional Weight

Next, determine the package dimensions in inches or centimetres. For each dimension, measure at the longest point, rounding each measurement to the nearest whole number (for example, 1.00 to 1.49 will be considered 1, and 1.50 to 1.99 will be considered 2). Measure the length, width and height of the package at its extreme points. If the package has a bulge or is irregularly shaped, include the bulge or irregular aspects of the package. Multiply the package length by the width by the height. The result is the cubic size in inches or centimetres.

Divide the cubic size by 139 if measured in inches, or by 5,000 if measured in centimetres, to determine dimensional weight. Increase any fraction to the next whole number.

Dimensional Weight Calculation

Notes: Size limits indicated by a box manufacturer may not reflect exterior dimensions of a package, including where a package may have bulges or otherwise may not be uniform across each plane, and should not be used as a substitute for actual length, width, and height measurements in determining dimensional weight.

Improper packaging may result in the alteration of a package's dimensions during transit which can affect the package's dimensional weight and result in a shipping charge correction.

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Determine the Billable Weight

Compare the package's actual weight to the dimensional weight. The greater of the two is the billable weight and should be used to calculate the rate.

For Multiple Package Shipments

When measured in pounds, total the billable weight of all packages in the shipment.

When measured in kilograms, round the fractional actual weight and dimensional weight of each package up to the next half kilogram. Add the greater of the actual weight and dimensional weight of each package to determine the total billable weight. If the total billable weight ends in a half kilogram, round up to the next whole kilogram.

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