Shipping calculators
Dimensional weight calculator.
Compare actual, dimensional, volumetric, and billable weight for common U.S. carrier divisors.
Package details
Result
Carrier rules need a service check
Divisors and rounding can vary by service, zone, package shape, and effective date. This shared engine uses transparent defaults for comparison: USPS 166 for qualifying cubic-volume parcels, UPS 139, and FedEx 139. Confirm the shipment-specific rule on the USPS, UPS, or FedEx site before buying a label.