USPS Dimensional Weight Calculator (166 Divisor)

Divisor (inches)

166 in³/lb

Divisor (metric)

6,000 cm³/kg

Example: 20×16×12 in box

23.1 lb dim

USPS applies dimensional weight only to Priority Mail and Ground Advantage packages larger than 1 cubic foot (1,728 in³).

Calculate USPS dimensional weight

Units

Length

Width

Height

Actual weight

Dim weight

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Billable weight

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Formula: L × W × H ÷ 166 (inches) or ÷ 6,000 (cm). Billable = greater of actual and dim weight, rounded up. Compare carriers on the main dim weight calculator.

Other carriers

FedEx · UPS · DHL Express · Amazon (FBA & Buy Shipping) · Canada Post · Australia Post · Purolator · Parcelforce · TNT