Chamber Pressurisation Physics

Calculate the free gas volume required to pressurise a diving chamber to a specified depth equivalent:

✓ Gas Volume = Chamber Volume × Pressure Increase
✓ Pressure Increase = Depth ÷ Conversion Factor (10 for MSW, 33 for FSW)
✓ Accounts for proper unit conversions and gas law physics

Pressurisation Gas Volume Calculators

Calculate required gas volumes for both metric and imperial chamber operations

Metric Calculator (MSW)
Free Gas Volume = (Chamber Volume × Depth Added) ÷ 10
Where 10 is the conversion factor (MSW to bar)
Units: Chamber volume in cubic meters (m³), depth in meters sea water (MSW)
Quick Presets:
Enter values and click calculate
Imperial Calculator (FSW)
Free Gas Volume = (Chamber Volume × Depth Added) ÷ 33
Where 33 is the conversion factor (FSW to atm)
Units: Chamber volume in cubic feet (ft³), depth in feet sea water (FSW)
Quick Presets:
Enter values and click calculate
Unit Conversions & Reference
m³ → ft³
Result will appear here
ft³ → m³
Result will appear here
MSW → FSW
Result will appear here
Conversion Factors
  • 1 bar = 10 MSW
  • 1 atm = 33 FSW
  • 1 m³ = 35.31 ft³
  • 1 MSW = 3.28 FSW

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