Dimensional Weight Calculator

(Show info)

Calculates the dimensional weight and other key metrics for a package.

Shipping rates are determined by the dimensional weight when it exceeds the scale weight - the greater of the dim. weight and scale weight is called the "billing weight". Dimensional weight is calculated by dividing the volume of the package by a "divisor". The dim. divisor may be different between carriers and also between domestic and international shipments. On June 23, 2019 USPS will change its domestic divisor to 166 from 194 which will increase the cost of shipping large packages.

Most carriers including FedEx and UPS assess dimensional weight on all packages. However, USPS does so on domestic Priority Mail shipments only if the package exceeds one cubic foot (e.g. 12 x 12 x 12"). Starting Jan 27, 2019, USPS will assess dimensional weight on packages going to all zones (1 - 9) instead of only on those going to zones 5 - 9.

Other dimension based surcharges may apply if the package exceeds certain length plus girth thresholds. This calculator will determine the billing weight and/or the applicable surcharge.

FedEx and UPS may have other surcharges when packages exceed certain (very large) dimensions but this calculator does not account for those at this time

Note: Starting on Jan 27 2019, USPS is eliminating "balloon rate" for packages going to zones 1 - 4 and replacing it with dim. weight. This calculator has not been updated to handle this change yet, so it may be inaccurate for very large packages going to zone 1-4. This note will be removed once the calculator has been updated.



Length: {{ Number(length).toFixed(1) }}"
Girth: {{ girth }}"
Length+Girth: {{ (Number(girth) + Number(length)).toFixed(1) }}"

Volume (in.): {{ volume.inRounded }}
Volume (ft.): {{ volume.ftRounded }}

Cubic Tier: {{ cubics }}

USPS Surcharge:
Enter weight/zone {{uspsSurcharge.surcharge}}

USPS Billing Weight:
Enter weight/zone {{ uspsSurcharge.billingWeight }}

Dimensional Weight:
Carrier Domestic International
{{ key }} {{ value.domestic }} lbs. {{ value.international }} lbs.

Ship Better,

Save More