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Shipping, Ecommerce & WarehouseGenerated accuracy model review: 2026-05-06
Packaging 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
- Packaging cost = materials + inserts and labels + labor minutes x labor cost per minute, then multiplied by 1 + waste rate / 100.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Materials Cost: $1.1
- Labor Time: 3 min
- Labor Cost per Minute: 0.42 $/min
- Inserts and Labels: $0.35
- Waste Rate: 5%
Expected outputs
- Packaging Cost per Order: $2.85
- Packing Labor Cost: $1.26
- Waste Allowance: $0.14
- Base Packaging Cost: $2.71
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
- Materials Cost accepts values in $.
- Labor Time accepts values in min.
- Labor Cost per Minute accepts values in $/min.
- Inserts and Labels accepts values in $.
- Waste Rate accepts values in %.
- Packaging Cost per Order is displayed as currency.
- Packing Labor Cost is displayed as currency.
- Waste Allowance is displayed as currency.
- Base Packaging Cost 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 packaging-cost-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Packaging Cost Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.