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Estimate thousands of square inches in a roll of paper of a given grade and basis weight and determine how many thousands of square feet are in the roll. When filling in these fields, use decimal fractions where necessary and give lengths in inches and weight in pounds.

MSI/MSF Calculator
Roll Weight: lbs.
Basis Weight:
Select…  (Or type in values below.)
Basic Size:(length × width) length
width
MSI =
MSF =

The numerical results from this calculator are estimates only and are not guaranteed.


Example

Find the MSI and MSF for a 900-pound roll of 80# book paper.

Formula:

Weight of Roll

 (Basis Weight ÷ [Area of Basic Size]) × 2

= MSI ÷ 144 = MSF

Equation:

900

 (80 ÷ [25 × 38]) × 2

= 5,344 MSI ÷ 144 = 37.111 MSF

Note: The MSI above is rounded to nearest whole number and the MSF is rounded to three decimal places.

 


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