ShipMargin
EconomicsVerified formula

Shipping Margin Calculator

See how fulfillment costs affect ecommerce contribution margin.

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

Measure contribution margin after shipping, packaging, fees, ads, and returns. 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 $50 order with $8 shipping and $25 in other costs contributes $17, or 34%.

Assumptions

  • • All inputs apply to the same order and use USD.

Limitations

  • • This is not tax, legal, or accounting advice.

Frequently asked questions

Is the Shipping Margin 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.