Calculators
Use our simple online industry calculators and conversion tools, including the Pipe Weight Per Foot Calculator and Barlow's Formula Calculator.
- Pipe Weight per Foot Calculator
- Barlow's Formula Calculator
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Pipe Weight Per Foot Calculator 
This formula can be used to determine the weight per foot for any size of pipe with any wall thickness.
Formula: 10.69*(Outer Diameter - Wall Thickness)*Wall Thickness
The Formula is Expressed as P=2St/D, Where:
P = pressure, psig
T = nominal wall thickness, in inches (i.e. .375)
D = outside Diameter in inches
S = allowable stress in psi, which depends on the pressure being determined utilizing Yield or Tensile depending on what is trying to be determined.
For Example:
Internal Pressure at Minimum Yield:
S= SMYS – minimum yield for grade of pipe
Ultimate Bursting Pressure:
S = SMTS – minimum tensile strength for grade of pipe
Maximum Allowable Operating Pressure:
S = SMYS – reduced by a design factor
Mill Hydrostatic Test Pressure:
S = SMYS – reduced by a design factor depending on OD and grade
Barlow's Formula Calculator 
Barlow's Formula relates the internal pressure that a pipe can withstand to its dimensions and the strength of its material.
The Formula is Expressed as P=2St/D, Where:
P = pressure, psig
T = nominal wall thickness, in inches (i.e. .375)
D = outside Diameter in inches
S = allowable stress in psi, which depends on the pressure being determined utilizing Yield or Tensile depending on what is trying to be determined.
For Example:
Internal Pressure at Minimum Yield:
S= SMYS – minimum yield for grade of pipe
Ultimate Bursting Pressure:
S = SMTS – minimum tensile strength for grade of pipe
Maximum Allowable Operating Pressure:
S = SMYS – reduced by a design factor
Mill Hydrostatic Test Pressure:
S = SMYS – reduced by a design factor depending on OD and grade