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millimeter of water (4°C)
Symbol:  mmH2O, mmCE (4 °C) 
Category:  Pressure 
SI Equivalent:  9.80638 Pa
Dimension ML-1T-2 
Small pressure unit defined by a column of water at 4°C with a height of 1 millimeter.
Convert     mmH2O, mmCE (4 °C)  
1 mmH2O, mmCE (4 °C) =
Energy density
  Symbol Unit Name
2.63195×10-4  Btu (IT)/ft3  British thermal unit (IT) per cubic foot 
4.22543×10-5  Btu (IT)/gal (UK)  British thermal unit (IT) per gallon (UK) 
3.51841×10-5  Btu (IT)/gal (US)  British thermal unit (IT) per gallon (US) 
9.80638  J/m3  joule per cubic meter 
9.80638×10-3  kJ/m3  kilojoule per cubic meter 
1.23231×10-3  MGOe  megagauss-oersted (MGOe) 
  Symbol Unit Name
9.99972×10-5  at  atmosphere (metric) 
9.67814×10-5  atm  atmosphere (standard) 
9.80638×10-5  bar  bar 
98.0638  barad  barad 
98.0638    barye 
7.35539×10-3    centiHg (0°C) 
7.35539×10-3  cmHg (0 °C)  centimeter of mercury (0°C) 
0.1  cmH2O  centimeter of water (4°C) 
98.0638  dyn/cm2  dyne per square centimeter 
3.28084×10-3  ft H2O  foot of water (4°C) 
9.80638×10-9  GPa  gigapascal 
9.80638×10-2  hPa  hectopascal 
2.89583×10-3  inHg (0 °C)  inch of mercury (0°C) 
2.90372×10-3  inHg (15.56 °C)  inch of mercury (15.56°C) 
3.94075×10-2  inH2O (15.56 °C)  inch of water (15.56°C) 
3.93701×10-2  inH2O (4 °C)  inch of water (4°C) 
9.99972×10-5  kgf/cm2  kilogram force per square centimeter 
9.99972×10-3  kgf/dm2  kilogram force per square decimeter 
0.999972  kgf/m2  kilogram force per square meter 
9.99972×10-7  kgf/mm2  kilogram force per square millimeter 
9.80638×10-3  kPa  kilopascal 
1.42229×10-6  kip/in2, ksi, KSI  kilopound force per square inch 
9.80638×10-6  MPa  megapascal 
1.00095×10-3  mH2O, mCE (15.56 °C)  meter of water (15.56°C) 
1×10-3  mH2O, mCE (4 °C)  meter of water (4°C) 
98.0638  µbar  microbar (barye, barrie) 
73.5539  µHg (0 °C)  micron of mercury (millitorr) 
9.80638×10-2  mbar  millibar 
7.35539×10-2  mmHg, torr, Torr (0 °C)  millimeter of mercury (0°C) 
1.00095  mmH2O, mmCE (15.56 °C)  millimeter of water (15.56°C) 
73.5539  mtorr  millitorr 
9.80638  N/m2  newton per square meter 
2.27567×10-2  ozf/in2, osi  ounce force (av.) per square inch 
9.80638  Pa, N/m2  pascal 
0.20481  lbf/ft2  pound force per square foot 
1.42229×10-3  psi, PSI, lbf/in2  pound force per square inch 
6.58958  pdl/ft2  poundal per square foot 
4.5761×10-2  pdl/in2  poundal per square inch 
9.67814×10-5  atm  standard atmosphere 
9.14332×10-5  tonf/ft2 (UK)  ton force (long) per square foot 
6.34953×10-7  tonf/in2 (UK)  ton force (long) per square inch 
9.99972×10-8  tonf/cm2 (metric)  ton force (metric) per square centimeter 
9.99972×10-4  tonf/m2 (metric)  ton force (metric) per square meter 
1.02405×10-4  tonf/ft2 (US)  ton force (short) per square foot 
7.11147×10-7  tonf/in2 (US)  ton force (short) per square inch 
7.35539×10-2  torr  torr