How is Cubic Weight Calculated?

To calculate cubic weight, multiply Length * Width * Height (LxWxH) then divide by 1728. If the result is between .1 & .5, your package qualifies for Cubic Weight. Anything higher than .5 would use the regular weight or dim calculation and would not qualify for cubic pricing. For more details on cubic discounts, visit the Help Center article: USPS Cubic Rates