Pressure and head

Most used

• µmMicrometre (micron)
• mmMillimetre
• cmCentimetre
• mMetre
• kmKilometre
• nmiNautical mile (international)
• inInch
• ftFoot
• ydYard
• miMile (statute)

More: SI

• dmDecimetre

More: US customary and imperial

• µinMicroinch
• milMil (thou)
• ftmFathom
• shackle (15 ftm)Shackle of chain (15 fathoms, 90 ft)
• chChain (Gunter's, international foot)

More: US customary

• ft (US survey)US survey foot
• mi (US survey)US survey mile
• cable (US)Cable's length (US, 120 fathoms)
• ch (US survey)Chain (US survey)

More: Industry units

• cable (0.1 nmi)Cable (international, 0.1 nmi)
• shackle (27.5 m)Shackle of chain (metric, 27.5 m)

Most used

• PaPascal
• kPaKilopascal
• MPaMegapascal
• mbarMillibar
• mH₂OMetre of water (conventional, mWC)
• kgf/cm²Kilogram-force per square centimetre (technical atmosphere, at)
• bar
• atmStandard atmosphere
• psiPound-force per square inch
• ksiKip per square inch

More: SI

• hPaHectopascal
• N/mm²Newton per square millimetre

More: Metric (non-SI)

• mTorrMillitorr
• mmH₂OMillimetre of water (conventional, mmWC)
• cmH₂O (4 °C)Centimetre of water at 4 °C
• cmH₂OCentimetre of water (conventional)
• Torr
• mmHgMillimetre of mercury (conventional)
• mswMetre of seawater (diving, 0.1 bar)

More: US customary and imperial

• psfPound-force per square foot
• inH₂O (68 °F)Inch of water at 68 °F (transmitter default)
• inH₂O (60 °F)Inch of water at 60 °F
• inH₂O (39.2 °F)Inch of water at 39.2 °F
• inH₂OInch of water (conventional, inWC)
• ftH₂O (39.2 °F)Foot of water at 39.2 °F
• ftH₂OFoot of water (conventional)
• inHg (60 °F)Inch of mercury at 60 °F
• inHg (32 °F)Inch of mercury at 32 °F
• inHgInch of mercury (conventional)

More: US customary

• fswFoot of seawater (US Navy, 64 lb/ft³)
• tsfShort ton-force per square foot