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Open-Source Calculator Models True Per-Unit Packaging Costs for E-Commerce Brands

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A packaging industry veteran with over a decade of experience has released an open-source calculator designed to give e-commerce founders a more accurate picture of their real packaging costs. Most existing tools only factor in box dimensions, material, and quantity, but the outer box typically represents just 32% of total packaging spend when design fees, inserts, freight, and other components are included. The new tool calculates a recommended per-unit budget as a percentage of retail price, adjusted for brand maturity and product category — ranging from over 10% for new premium brands down to around 3% for established ones. It then breaks that budget across nine cost categories, including inner packaging, shipping, protective materials, and printed inserts, based on data gathered from hundreds of real projects. The calculator's code is publicly available for anyone to fork and adapt.

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