mmH2O

Translingual

Etymology

mm (“millimeter”) +‎ H2O (“water”)

Symbol

mmH₂O

1. Abbreviation of millimeter of water. A unit of pressure, the pressure exerted by a column of water of 1 mm in height at 4 °C (in standard conditions, the temperature at which water has maximum density, in standard Earth gravity)

Synonyms

• mm.g
• mm.w.g.
• mm.wc

 

Related terms

• cmH₂O
• inH₂O
• mH₂O
• mmHg

 

See also

• atm
• Pa
• psi
• Torr