Dimensional Weight Calculator

Carriers bill a parcel on whichever is larger, the weight on the scale or a dimensional weight worked out from its size. Enter the packed box, its real weight and a carrier divisor, and you get the dimensional weight, the billable weight, the volume and the length plus girth that oversize surcharges are written against. The published divisors are here, 139 and 166 cubic inches per pound and 5000 and 6000 cubic centimetres per kilogram, along with a box for the divisor in your own rate agreement. Those numbers are tariff terms rather than physics: UPS and FedEx moved US domestic parcels from 166 to 139 in 2019, so check the figure in your current contract before you quote a price.

Calculator Type

Dimension Unit

Inches Centimetres

Measure the outside of the packed box at its widest point, bulges included.

Weight Unit

Pounds Kilograms

Units for Your Own Divisor

Cubic inches per pound Cubic centimetres per kilogram

Enter the packed box and the weight on the scale. The parcel is billed on whichever of the two weights is larger.

Length (in) *

Width (in) *

Height (in) *

Actual Weight on the Scale (lb) *

Carrier Divisor

Each divisor is quoted in the units its own tariff publishes, so pick the tariff you are shipping on rather than the units you measured in. Your box is converted to match, and the answer comes back in the pounds or kilograms that tariff bills in.

Your Own Divisor (in)

Only used when the option above is set to your own rate agreement.

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