Description
Multiply specificForeignDuty by positive domesticPerForeign and divide by unitsPerCustomsUnit for domesticDutyPerUnit.
A specific duty is an amount per unit, while an ad valorem rate is a fraction of a valuation base. Quotas and input-output adjustments introduce additional supplied assumptions.
Multiply specificForeignDuty by positive domesticPerForeign and divide by unitsPerCustomsUnit for domesticDutyPerUnit.
When to use this tool
Use Import Tariff Specificunit Exchange Factor when you need a tariff or quota-model arithmetic component.
How to use the tool and how it works
- Enter specificForeignDuty, domesticPerForeign, unitsPerCustomsUnit, shipmentUnits. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read domesticDutyPerUnit, totalDuty. Use the output convention below.
Multiply specificForeignDuty by positive domesticPerForeign and divide by unitsPerCustomsUnit for domesticDutyPerUnit. Multiply that per-shipment-unit amount by shipmentUnits for totalDuty.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| specificForeignDuty | Specific Foreign Duty | Required. Finite number; minimum 0. |
| domesticPerForeign | Domestic Per Foreign | Required. Finite number; strictly above 0. |
| unitsPerCustomsUnit | Number of shipment-count units contained in one customs tariff unit. | Required. Finite number; strictly above 0. |
| shipmentUnits | Shipment Units | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| domesticDutyPerUnit | Domestic Duty Per Unit | Required. Finite number. |
| totalDuty | Total Duty | Required. Finite number. |
{
"input": {
"specificForeignDuty": 10,
"domesticPerForeign": 2,
"unitsPerCustomsUnit": 100,
"shipmentUnits": 500
},
"output": {
"domesticDutyPerUnit": 0.2,
"totalDuty": 100
}
}Limitations and assumptions
- The specific duty is per customs unit and the factor counts shipment units per customs unit; actual classification, quote date, and legal rates are not selected.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Verify classification, origin, valuation, quota allocation, and current law with the responsible customs professional.
References
Similar or alternative tools
- Tariff Advalorem Equivalent Term
Divide specificCharge × quantity by positive declaredValue for rateContribution.
- Tariff Rate Quota Two Tier Cost Term
Use the smaller of quantity and quotaRemaining as inQuotaQuantity and the positive excess as outQuotaQuantity.