Dimensional weight calculator

Compare dimensional weight (length × width × height ÷ divisor) with actual package weight.

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Dimensional weight calculator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Package length

Package width

More inputs and assumptions

Package height

Carrier divisor for these units

Actual package weight

Answer

…

Compare dimensional weight (length × width × height ÷ divisor) with actual package weight.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Saved scenario

Save the current answer, then change an input to compare. This clears when you leave.

Formula and assumptions

The divisor and units come from your carrier agreement. No carrier default, rounding rule or tariff is supplied. Enter externally rounded dimensions if your carrier requires them; final billed weight may differ. Fixed assumptions only: no taxes, fees, changing returns, guarantees or product eligibility. Amounts share one currency.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-26

Using Dimensional weight calculator

Compare dimensional weight (length × width × height ÷ divisor) with actual package weight.

Next: Volume calculator

A worked example

Example inputs: package length = 40, package width = 30, package height = 20, carrier divisor for these units = 5000, actual package weight = 3. Billable weight before carrier rounding = 4.8.

Before you use the result

Example results for package length

These examples use Package width: 30; Package height: 20; Carrier divisor for these units: 5000; Actual package weight: 3. They are reference calculations, not recommended settings.

Package length	Billable weight before carrier rounding
20	3
40	4.8
80	9.6

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ToolOctopus. “Dimensional weight calculator.” Updated 2026-09-26. https://tooloctopus.com/dimensional-weight-calculator.

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