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Amazon (FBA & Buy Shipping) dimensional weight calculator

Divisor 139 in³/lb · 5,000 cm³/kg. Part of freightcalcs.com.

Divisor (inches)
139 in³/lb
Divisor (metric)
5,000 cm³/kg
Example: 20×16×12 in box
27.6 lb dim

Amazon uses a 139 divisor for FBA outbound fee weight tiers and Buy Shipping labels.

Calculate Amazon (FBA & Buy Shipping) dimensional weight

Dim weight
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Billable weight
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Formula: L × W × H ÷ 139 (inches) or ÷ 5,000 (cm). Billable = greater of actual and dim weight, rounded up. Compare carriers on the main dim weight calculator.

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