ShipMargin
PackagingVerified formula

Packaging Efficiency Calculator

Quantify how effectively a box protects product without shipping excess volume.

Free · no sign-up
Package inputs
Use outside package dimensions. Your result stays on this device unless you choose to save it.

Product dimensions (in)

Box inside dimensions (in)

Live result Deterministic
Shipping intelligence
No AI estimates. Every output comes from the published formula.

Your result will appear here

Enter package data and calculate. No account is required.

How to read the result

A decision, not just a number

Score box utilization, void space, and billable-weight efficiency from 0 to 100. Read the result alongside its interpretation, formula version, assumptions, and source. If a carrier rule is not verified, the production result remains disabled.

Worked example

Example calculation

A product filling 80% of a box with equal actual and billable weight scores in the Excellent range.

Assumptions

  • • Product and box are rectangular.
  • • A practical fill target of 85% receives full volume credit.

Limitations

  • • The score does not evaluate fragility, compression, or material strength.

Frequently asked questions

Is the Packaging Efficiency Calculator free?

Yes. Core ShipMargin calculators are free and show results without requiring an account.

Does this calculate a shipping price?

No. Without a verified live rate source, ShipMargin reports deterministic weights, dimensions, fit, or margin metrics—not invented dollar savings.

Can I save the result?

Anonymous results can be copied or shared. Saving calculation history is an optional account feature once Supabase is configured.