ShipMargin
WeightVerified formula

Billable Weight Calculator

Find the greater of actual and dimensional weight under a selected verified rule.

Free · no sign-upRule: generic-dim-v1
Package inputs
Use outside package dimensions. Your result stays on this device unless you choose to save it.
Generic DIM scenario
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

Compare actual and dimensional weight to identify the billable weight. 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

When actual weight is 5.2 lb and DIM weight is 9 lb, billable weight is 9 lb and DIM penalty is 73%.

Assumptions

  • • Billable weight is the greater of actual and dimensional weight.

Limitations

  • • Carrier minimums, zones, and negotiated rates are outside this tool.

Frequently asked questions

Is the Billable Weight 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.