Conversion Table
Engineering Terms

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Pressure & Flow Terms

Velocity = Distance/Time or Flow/Area
Flow = Volume rate per period of time
SCFM = Standard cubic feet per minute
Temp = 68 deg F
Altitude = Sea level
Air density = 0.075 lb/ft³
FPM = Feet per minute
MPH = Miles per hour
KPH = Kilometers per hour
Density = Weight per volume of air  Standard Air = 0.075 lb/ft³
Specific Gravity (SG) = Density ratio relative to air  Standard Air SG = 1.0  Methane SG = 0.55
IWG = Inches of water gauge
PSIG = Pounds per square inch gauge
MM of Water = Millimeter of water gauge
IHG = Inches of mercury gauge
mbar = Millibar gauge
PSIA = Pounds per square inch absolute
Standard Atmosphere = 0 PSIG = 14.7 PSIA

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