About this calculator

Calculate billable weight for rectangular packages using a selected dimension-rounding rule, dimensional-weight divisor, cube threshold and weight increment. Each package is rated before quantities are added.

Inputs

How to use this calculator

Package group

  1. Outer length (in)Outer tendered dimensions including packaging and projections.
  2. Outer width (in)Outer tendered dimensions including packaging and projections.
  3. Outer height (in)Outer tendered dimensions including packaging and projections.
  4. Actual weight per package (lb)Gross weight including all packaging and pallet tare.
  5. Identical piecesPositive whole count. Add a row for different dimensions or per-piece weight.

Shared inputs

  1. Dimensional divisor (in³/lb)Fixed divisor unit. Obtain your service or contract value; 139 is an editable example, not a universal carrier preset.
  2. Dimension rounding in inchesMeasurement conversion happens before the selected inch-based rounding rule.
  3. Billable weight increment (lb)Fixed pound increment for each package. Enter 0 to keep the unrounded result.
  4. Apply dimensional weight only above this rounded cube (in³)Enter 0 to apply dimensional weight to every positive cube. A positive threshold applies only when the rounded cube is greater; use the rule in your agreement.

Enter the shipment or scenario values, then select Calculate result.

Method

Formula and variables

Convert each package to inches/pounds. Apply selected side rounding. If rounded cube exceeds the entered threshold, dimensional lb = cube ÷ divisor; otherwise this model uses actual weight only. Per-package billable lb = upward rounding of max(actual, dimensional) to the entered pound increment. Multiply by quantity and sum.

Outer length (in)
Outer tendered dimensions including packaging and projections.
Outer width (in)
Outer tendered dimensions including packaging and projections.
Outer height (in)
Outer tendered dimensions including packaging and projections.
Actual weight per package (lb)
Gross weight including all packaging and pallet tare.
Identical pieces
Positive whole count. Add a row for different dimensions or per-piece weight.
Dimensional divisor (in³/lb)
Fixed divisor unit. Obtain your service or contract value; 139 is an editable example, not a universal carrier preset.
Dimension rounding in inches
Measurement conversion happens before the selected inch-based rounding rule.
Billable weight increment (lb)
Fixed pound increment for each package. Enter 0 to keep the unrounded result.
Apply dimensional weight only above this rounded cube (in³)
Enter 0 to apply dimensional weight to every positive cube. A positive threshold applies only when the rounded cube is greater; use the rule in your agreement.

Interpret the result

The shipment total is the sum of prepared per-package billable weights. It is a configurable model and does not import all service-specific minimums or oversize rules.

Outputs: Billable weight per package and shipment total

A configurable rectangular-package model, not a FedEx/UPS/USPS rate engine. Service thresholds, package types, oversize/minimum weights, special rounding and exclusions must be checked separately. The general carrier page reviewed describes nearest-inch rounding; verify the governing service/contract before choosing a rule. No live rate or invoice guarantee.

Worked example

Check the arithmetic

This example uses the starting values shown above. The arithmetic below is calculated independently of the interactive result.

Work through the calculation

  1. Rounding each side up to the next inch changes 12.1 × 10 × 8 in to 13 × 10 × 8 in, for a cube of 1,040 in³.
  2. Dimensional weight = 1,040 ÷ 139 = 7.482014 lb, greater than the 5.1 lb actual weight.
  3. Rounding each package up to the next whole pound gives 8 lb per package. Two packages total 16 lb billable weight.

Compare the displayed result

Expected displayed result: 16 lb billable

FAQs

Does switching dimension rounding leave the answer unchanged?

No. The rounded cube feeds dimensional weight. Select the rule in the governing service or contract rather than choosing the smallest result.

Sources

These references support the methods or rules used on this page. Check the version effective for your shipment date and any applicable carrier terms or item-specific provisions.

Example inputs and options

Starting values are examples unless a field identifies a dated rule. Unit selectors convert only fields marked for conversion. Rates and model options keep the units and basis shown in their labels.

Outer length (in)
Example: 12.1
Outer width (in)
Example: 10
Outer height (in)
Example: 8
Actual weight per package (lb)
Example: 5.1
Identical pieces
Example: 2
Dimensional divisor (in³/lb)
Example: 139
Dimension rounding in inches
Example: Round every side up to the next inchOptions: Keep exact measured dimensions; Round every side up to the next inch; Round every side to the nearest inch, with halves rounded up
Billable weight increment (lb)
Example: 1
Apply dimensional weight only above this rounded cube (in³)
Example: 0