The calculator multiplies rate by value in your browser; when this page's script does not load, pressing Calculate can only send you to a raw API response, never a quote. The rates themselves are plain HTML: the HS code browser prints every line's General, Special and Column 2 rate, the HTS duty lookup shows a worked example per chapter, and the duty guides explain stacking and de minimis.
HS Code Lookup & Tariff Calculator
The free HS code lookup: enter an HTS code plus origin and shipment value → estimated US import duty.
Unlimited lookups, bulk HTS rate tables and whole-chapter CSV export via API — $10 of credits, no subscription required.
Data behind every estimate
How big is the US tariff schedule behind this calculator?
The rebuild of the official USITC export generated October 19, 2026 covers 23,193 HTS lines, of which 36.7% carry a Free Column 1 general rate; the highest plain ad-valorem general rate is 350% (2401.10.65, Other). Every figure links back to the official USITC HTS database.
Do Section 301 / 232 measures stack here?
Yes — 637 Chapter 99 provisions across 30 measure groups (USITC export retrieved October 10, 2026) are matched automatically on top of the base rate; the raw schedule is published via the USITC Chapter 99 REST export.
Is the $800 de minimis exemption still in force?
It is not: the exemption was dismantled in three steps you can verify in the primary sources: Pub. L. 119-21 full text on GovInfo; EO 14324 full text on Federal Register; CBP Dec. 26-13 full text on Federal Register. The calculator therefore shows landed-cost estimates without a duty-free small-import carve-out.
Monthly tariff-update digest
One email a month: Section 301 moves, rate changes, new free tools. Double opt-in, no cookies, unsubscribe anytime.
Beyond rates, the site mirrors enforcement and regulatory corpora with provenance: monthly UFLPA stopped-shipment statistics, current EU TARIC measures, the Federal Register trade-notice census, and the annual Global Trade Signals report.
How is the duty estimate computed?
The ad valorem percentage and any specific per-unit component of the official Column 1 general rate are applied to your shipment value and quantity, then any matching Chapter 99 provision — like the 25% Section 232 steel measure in force since 2018 — is stacked on top. Rates reflect the USITC schedule rebuilt October 19, 2026.
Where do the rates come from?
Every rate is republished from the official US Harmonized Tariff Schedule maintained by the USITC (23,193 lines, export of October 19, 2026); classification rulings remain searchable via CBP CROSS. Each dataset stores its source URL and timestamp so you can audit any figure against hts.usitc.gov.
Does the calculator include Section 301 or 232 duties?
Yes, within stated boundaries. Section 301 additional duties are matched by 8-digit line and origin and folded into the total: Lists 1-3 (+25%), List 4A (+7.5%) and the 2024 review. Suspended List 4B lines carry none, and the calculator says so rather than returning a silent zero. Not included: antidumping/countervailing orders, granted exclusions, IEEPA/reciprocal measures, and MPF/HMF fees (shown separately).
Why does the country of origin matter?
Trade-remedy duties attach to origin, not to the shipping route. Goods transshipped through a third country remain China-origin unless they meet the substantial-transformation test under 19 CFR Part 134, so a foreign commercial invoice alone cannot remove Section 301 duties; CBP rulings show how the test is applied.
Can I use the estimate for a customs declaration?
Treat it as a planning estimate. Entered value, valuation additions under 19 CFR Part 152, freight terms and the entry date determine the legal amount CBP assesses. ExportSonar mirrors the official rate tables; for certainty, request a binding ruling from CBP before relying on any figure.
How do I find a free duty calculator for US imports?
You are on one: ExportSonar estimates landed duty for any of the 23,193 HTS lines in the October 19, 2026 USITC export without an account or a lookup cap. Enter a code, origin country and shipment value; the result stacks matching Section 301 or 232 provisions from the October 10, 2026 trade-remedy export on top of the base rate. Unlike metered competitors, the free tier here prices a whole product catalog, not just the first queries of the month.
Primary sources: USITC Harmonized Tariff Schedule · CBP CROSS classification rulings · 19 CFR Part 152 — Customs valuation (eCFR) — republished with provenance by exportsonar.com