ShipMargin
PackagingVerified formula

Will It Fit?

Check whether a product can fit inside a box with padding and optional rotation.

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

Test all dimension permutations and approximate multi-item grid capacity. 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 10 × 6 × 4 in product can rotate into a 6 × 10 × 5 in box.

Assumptions

  • • Items are rigid rectangular cuboids.
  • • Padding is uniform.

Limitations

  • • Multi-item fit is an approximate grid arrangement, not exact 3D bin packing.

Frequently asked questions

Is the Will It Fit? 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.