Free calculator

Dimensional Weight Calculator

Check whether package volume could raise billed weight using a dated carrier divisor.

Calculate

Estimates only. Confirm figures against invoices and the carrier’s current rules.

What this calculator answers

Could package size increase billed weight versus actual scale weight for common US parcel carriers?

Formula

Dimensional weight (lb) = (length × width × height in inches) ÷ divisor. Default divisor 139 is a 2026 desk check for common UPS/FedEx domestic programs—verify the live service guide.

Source note

Last verified September 8, 2026. USPS uses different thresholds. Prose version: how dimensional weight works.

Limitations

Not a rate quote. Enter billed dimensions. Terms of Use.