How is the duty estimate computed?

The ad valorem percentage and any specific component from the official Column 1 general rate are applied to your shipment value (and quantity where applicable), then summed into the total estimate.

Where do the rates come from?

Every rate is republished from the official US Harmonized Tariff Schedule maintained by the USITC; classification rulings can be searched via CBP CROSS.

Tariff Calculator

HTS code + origin + shipment value → estimated US import duty.

HS code

6–10 digits, dots optional

Country of origin

Shipment value (USD)

Quantity (optional)

Needed when the rate has a specific ($/unit) part

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Calculator FAQ

How is the duty estimate computed?: The ad valorem percentage and any specific component from the official Column 1 general rate are applied to your shipment value (and quantity where applicable), then summed.
Where do the rates come from?: Every rate is republished from the official US Harmonized Tariff Schedule maintained by the USITC; classification rulings can be searched via CBP CROSS.

Sources: USITC Harmonized Tariff Schedule · CBP CROSS rulings