FORMULA FOR CALCULATING WEIGHT PER FOOT
ON ROUND STAINLESS AND CARBON STEEL TUBING AND PIPE*

Average Weight /Foot
  W = 10.68 (D – t)t
Minimum Weight/Foot
  W = 10.68 [D- (t / 0.875)] (t / 0.875)
Where W = Weight in pounds per foot (carried to four digits)
  D = Outside diameter in inches (to three decimal places)
  t = Wall thickness in decimals (to three decimal places)
 
*To determine Average or Minimum Wall Weight of square or rectangular tubing, substitute 13.60 for 10.68 in the above formula.
Formula for calculating weight per foot on stainless and carbon steel bars
  Rounds: 2.673 x D2
  Squares: 3.403 x D2
  Hexagons: 2.947 x D2
  Flats: 3.403 x T x W