Yes, completely free with no signup required.

Does my data leave my device?

No. All calculations happen in your browser — nothing is sent to a server.

Does it work on mobile?

Yes. The tool is mobile-first and works on any modern browser.

重量と配送業者レートから送料を試算し、送料無料ラインの価値を評価。

Package weight Unit

Carrier rate (per unit)

e.g. USPS Ground Advantage ≈ $0.80/oz, UPS ≈ $1.20/lb

Base handling fee (optional)

Free-shipping threshold (optional)

Current cart total (optional)

Enter the package weight and select the unit (lb, kg, or oz).
Enter the carrier's per-unit rate and any base handling fee.
Optionally enter the free-shipping threshold and your cart total to see if it's worth adding more items.

Is this tool free?: Yes, completely free with no signup required.
Does my data leave my device?: No. All calculations happen in your browser — nothing is sent to a server.
Does it work on mobile?: Yes. The tool is mobile-first and works on any modern browser.

Last updated: 2026-05-20 By jarvisbox