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Shipping, Ecommerce & WarehouseGenerated accuracy model review: 2026-05-06
Landed Cost Calculator accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- Duties = product cost x duty rate / 100. Landed cost = product cost + freight + insurance + duties + brokerage + domestic handling.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Product Cost: $4,800
- Freight Cost: $900
- Insurance Cost: $120
- Duty Rate: 6.5%
- Brokerage Cost: $175
- Domestic Handling: $240
- Units: 500
Expected outputs
- Total Landed Cost: $6,547.00
- Landed Cost per Unit: $13.09
- Estimated Duties: $312.00
- Freight, Insurance, and Handling: $1,435.00
Known limitations
- These calculators do not fetch live carrier rates, marketplace fees, duty schedules, ad platform data, exchange rates, tax rates, or fulfillment provider pricing. Enter the current assumptions that apply to your store.
Assumptions
- All prices, costs, rates, duties, shipping charges, and campaign assumptions are user-entered.
- Calculations are deterministic and run locally in the browser without uploading ecommerce or customer data.
- Results are planning estimates and do not include every tax, refund, chargeback, inventory, financing, or accounting adjustment.
Unit handling
- Product Cost accepts values in $.
- Freight Cost accepts values in $.
- Insurance Cost accepts values in $.
- Duty Rate accepts values in %.
- Brokerage Cost accepts values in $.
- Domestic Handling accepts values in $.
- Units accepts numeric values.
- Total Landed Cost is displayed as currency.
- Landed Cost per Unit is displayed as currency.
- Estimated Duties is displayed as currency.
- Freight, Insurance, and Handling is displayed as currency.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
- Currency outputs are displayed with standard US dollar formatting.
- Input precision follows configured step values where provided.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current landed-cost-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Landed Cost Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.