How to Calculate Trim in Easy step

Trim Waste in kg = weight of roll x trim size in mm / roll size

Weight of Roll = 325 kg
Rolls Size = 875 mm
Trim Size = 15 mm

Trim Waste in kg = 325 x 15 / 875 = 5.57 kg

Trim Waste % = trim size / roll size %
Trim Waste % = 15 / 875% = 1.71%