Result
- Web length
- 5,528 m
- Roll outside diameter
- 600 mm
- Roll weight (without core)
- 254.3 kg
Values for tightly wound material without air gaps. Film densities are typical values.
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How it is calculated
How do you calculate the length of a roll?
Length = π × (D² − d²) ÷ (4 × thickness). D is the roll outside diameter, d the core outside diameter, all in the same unit. Example: a 600 mm roll on a 90 mm core with 50 µm film holds about 5,500 m.
How do you calculate the roll diameter from the length?
Diameter = √(d² + 4 × length × thickness ÷ π), where d is the core outside diameter.
How do you calculate the roll weight?
Weight = length × web width × grammage. For film, grammage in g/m² = density in g/cm³ × thickness in µm, e.g. PE 0.92 × 50 µm = 46 g/m².