Please note that these equations assume that there is
no air gap between adjacent paper layers hence this formulae should not be
used for tissue and some other bulky paper rolls. Actual length may
be less than the calculated length.
Paper Length Calculation when Weight of Roll & Paper
Basis Weight is Known
If you know the net weight (Total weight - Core weight) of the roll and the
Basis weight of the paper, you can calculate the length of paper
using following equations.
Net weight of Paper
Width of Roll
Basis Weight of Paper
Metric or ISO Units (Weight in Kgs, Width in cm and Basis Weight in
Length of Paper in Meter:
Example: Let Net Weight of Roll (M) is 500 Kgs, Width of Roll (W) is 100 cm and
Basis weight or GSM is 100g/m2.
Length of Paper in Meter = 100,000*500/100*100 = 5000 m
English or US Units (Weight in lbs, Width in Inches and Basis
Weight in lbs)
Easiest way is to convert lbs weight in to Basis weight or GSM
To use the Weight Conversion tool, please select a Type of Paper
from the pull down menu, then enter a value in pounds and hit
calculate. To reverse the calculation simply select
"gsm2->lbs" and enter a gsm value.