Starting with defining the water density and gravity, a convenient water density to use is 1000 kg/m³ which is very close to the density at 4 degC. Use the standard for gravity at sea level of 9.80665 m/s², then you can calculate the pascals pressure generated by 1 metre of water using SI units as described in the conversion calculation below:
- 1 mH2O = 9,806.65 pascals (Pa)
- 1 psi = 6,894.76 pascals (Pa)
- mH2O value x 9,806.65 Pa = psi value x 6,894.76 Pa
- mH2O value = psi value x 0.703070
Enter a pressure in psi below to convert it to the equivalent pressure in mH₂O 4°C.
Choose a value between 0 and 1000 psi from the pressure conversion table below, to obtain the converted value in mH₂O 4°C.