1 inch = 25.4 mm                 1 meter = 39.37 ins                    1 ounce = 28.35 g               

1 kilogram = 2.205 lbs          1 ton   =  2,000 lbs                     1 metric tonne =  2,205 lbs                  

1 long ton    =  2,240 lbs       Weight in pounds per square foot = BW  / basic area in square feet     

Price/square foot = weight in pounds. per square foot X $ per pound.              example 70#/3300 x $0.75 = $0.02 / sq.foot

$ per MSF = $ per lb. x BasisWeight / (basis area in square feet / 1000)        example $0.75 x 60# / (3300/1000)

$ per Ton = $ per MSF x (basis area/1000) / (basis weight)                           example $13.64 x (3300/1000) / 60# = $0.75
M Weight = L X W X BW / basis area                                                          example 12 x 18 x 70# / 3300 = 4.58 lb/M

$ per Sheet = M Weight X $ per LB / 1000                                                   example 4.58 x $0.75 / 1000 =  $0.003435
Number of Sheets = Total Weight / lbs per sheet
Linear Feet in Roll = 41.67 X Net Weight (lb.) X base sheet area / (Roll width x BW)
 

Notes: examples
·

70# text (3,300 sq.feet basis) selling at $0.75/lb = $15.91/msf or $0.1105/msi

i.e. $0.75 x 70# / (3300/1000) = $15.91 / msf

60#   text selling at $0.75 / lb. = $13.64 / msf or $0.0947 / msi

70#   text selling at $0.75 / lb. = $15.91 / msf or $0.1105 / msi

80#   text selling at $0.75 / lb. = $18.18 / msf or $0.1263 / msi

105# text selling at $0.75 / lb. = $23.86 / msf or $0.1657 / msi

Glossary: msi - thousand square inches; msf - thousand square feet

To convert from basis weight in pounds to gsm (grams per square meter): multiply basis weight by 1406.13 and divide by the base sheet area in square inches.Cover weight example : 100 lb. - 20 x 26 - 500 = 100 x 1406.13 / 520 = 270 gms

To calculate a sample weight - where weight scale weights in gms.

432,000 / (sheet area ins 2) x weight in gms x (.03527/16)

example 432,000 / (117 sq in) x 2.36 gsm x (.03527/16) = 19.2#/3000 sf