GIFSQ Tools · Module 10 — Packaging & Shelf-Life · Tool 191 of 500
Price a pack from the film price per kilogram, polymer density, film thickness and film area per pack — cost per pack and per 1,000 packs.
Try sample values — fills the form with the worked example below.
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Film per pack (g)
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Cost per pack ($)
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Cost per 1,000 packs ($)
Equation: Film volume (m³) = area (m²) × thickness (m). Film mass (kg) = volume × density (kg/m³). Cost per pack ($) = mass (kg) × price ($/kg). Cost per 1,000 = cost per pack × 1,000.
Method: Packaging material costing from film geometry and the supplier price. Density in g/cm³ converts to kg/m³ by multiplying by 1,000.
Assumptions: the film is one uniform layer at the stated thickness; scrap, seals and print are not included.
Limitations: real cost adds scrap, changeover, seals, print and wastage — typically 5–15% on top of the film cost; this tool prices the film alone.
Rounding: mass to 2 decimal places; cost per pack to 4 decimal places; cost per 1,000 to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Method: Packaging material costing from film geometry and the supplier price. Density in g/cm³ converts to kg/m³ by multiplying by 1,000.
Assumptions: the film is one uniform layer at the stated thickness; scrap, seals and print are not included.
Limitations: real cost adds scrap, changeover, seals, print and wastage — typically 5–15% on top of the film cost; this tool prices the film alone.
Rounding: mass to 2 decimal places; cost per pack to 4 decimal places; cost per 1,000 to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Worked example: Film at $4/kg, density 0.92 g/cm³, 50 µm thick, 0.04 m² per pack: mass = 0.04 × 50×10⁻⁶ × 920 = 1.84 g; cost = 0.00184 × 4 = $0.0074 per pack, or $7.36 per 1,000 packs.
Enter values above to see results.
Compare films on cost per pack, not price per kilogram — a thinner, denser film can be cheaper per pack. Tool 191 of 500 — GIFSQ
