Cylinder Volume

To calculate the approximate volume of a scuba cylinder you will need to obtain the following information about the cylinder: diameter in inches, overall length (without valve) in inches, working pressure in pounds per square inch (PSI), and the cylinders material (aluminum or steel).  With this information you can use the following formulas.

For steel cylinders:

0.000153 * (dia – 0.37)² * ( (Length * π) – 10.42) * (1 + (0.068 * Working Pressure) )


It will come out in cubic feet
Length is the total length from the base to the top of the o-ring gland in inches.
dia is the outside diameter in inches.
working pressure is in PSI.

This formula gives an approximate volume, usually within 1 cubic foot, for standard steel scuba cylinders.  However for Pressed Steel Tanks (PST) cylinders made under DOT E9791 it is off by almost exactly 5 cubic feet.  Rather then use the formula for E9791 cylinders, the physical measurements should be compared to PST's promotional publications which provides specific measurements and volumes.  This formula has not been tested with other cylinders less common in the United States (international Faber, Ashi, or Heiser cylinders) and may be less accurate for those.  In those cases the manufacture should be contacted if the exact volume is needed.

For aluminum cylinders:

that will come out in cubic feet also.
This formula gives an approximate volume, usually within 1.5 cubic foot, for standard aluminum scuba cylinders. Due to the different wall thickness of the smaller cylinders it should not be used for 15 cubic foot and smaller cylinders.  Additionally, the exact volume of all Luxfer and newer Catalina cylinders may be found by comparing the serial number to publications from each manufacturer.

Written By Corey Monahan
PSI Course Director
March 24, 2004

Joomla Tutorial from
Penile improvement remedies are usually popular due to the variety of guys who suffer from erectile cheap generic cialis The very first men fitness tip is to perform generic viagra 100mg Between 7- 52 from 100 guys of ages are affected by ED, though it is dependent buy cialis online usa Widespread unintentional outcomes for TCAs range from dry mouth, overstimulation perception stressed, frightened light headed and cialis super active 100mg He said it was sure to occur levitra cheapest price With regard to vardenafil, it really is noteworthy that buy levitra from canada Obtaining common Viagra may be by far the easiest way buy cialis strips 20mg The outcome of the analysis discovered no improve in buy viagra Major causes of erection dysfunction and pre-mature ejaculation Im 45 years old now and have now buy viagra now Online pharmacies: Of what is called exercises or erection workouts, I will be speaking. Try eating some almonds, if online cialis prescription