DimWeight3PL Studio — Free Interactive In-Browser Studio
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Quick Reference & Frequently Asked Questions
How do 3PLs and carriers calculate dimensional (DIM) weight?
Multiply package Length x Width x Height in inches and divide by the DIM divisor (typically 139 for UPS/FedEx or 166 for USPS), then round up to the next full pound.
Why did my 1.5 lb order get billed at the 6 lb shipping rate by my 3PL?
If a 1.5 lb product is packed inside a 12x10x6 inch box (720 cubic inches), dividing 720 by 139 equals 5.18 lbs, which carriers round up to a 6 lb billable weight.
How can I reduce 3PL pick and pack fees on multi-item bundles?
Pre-kit your top-selling 2-pack and 3-pack bundles at the factory under a single barcode so your 3PL bills one first-pick fee instead of multiple extra-item picks.
When does USPS Ground Advantage beat UPS or FedEx for e-commerce orders?
USPS Ground Advantage uses a 166 DIM divisor and exempts packages under 1 cubic foot (1,728 cubic inches) from DIM pricing, saving $2 to $5 on compact parcels.