Paper-roll length, meter

How much paper fits on a roll?
L = ( ((Dy x Dy) - (Di x Di)) x 3.14 ) / ( 4 x T )
T (Thickness) mm
D (Outer diameter) mm
d (Inner diameter) mm
Length m
No of 75mm receipts pcs
No of A4 pages pcs
No of Letter pages pcs
Change T, D, and/or d, press TAB
and the rest will be calculated

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Last Updated on 08-jul-2003
By Staffan Fällström