Film Roll Weight Calculator
Calculate exact roll weight (kg) for PET, BOPP, CPP, LDPE or paper from length, width and thickness. Free — no login.
W (kg) = Length (m) × Width (mm)/1000 × Thickness (μm)/1,000,000 × Density (kg/m³)
How the formula works
Volume of film = length × width × thickness. Convert units so everything is in metres, then multiply by density (kg/m³) to get mass in kg.
- Width is entered in mm → divide by 1000 to get metres.
- Thickness is entered in micron (μm) → divide by 1,000,000 to get metres.
- Density is material-specific (PET denser than BOPP).
Example: 10,000 m × 1500 mm × 12 μm PET → about 248.4 kg.
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