Convert Millimeter of Water to Meter of Head (mmH2O to Meter of Head)

Millimeter of Water (mmH2O) and Meter of Head (Meter of Head) are both units of pressure. With the conversion form below, you can effortlessly and accurately convert millimeter of water to meter of head. This free online calculator tool makes it simple and easy to perform the conversion from mmH2O unit to the Meter of Head unit.

Pressure is the force applied perpendicular to a surface per unit area: P = F / A. The SI unit is the pascal (Pa), equal to one newton per square metre (1 Pa = 1 N/m²). Practical applications use larger units: the bar (1 bar = 100,000 Pa, close to standard atmospheric pressure), atmosphere (atm) (1 atm = 101,325 Pa), and psi (pounds per square inch, used in the US for tire and gas pressures). Blood pressure is measured in mmHg (millimetres of mercury), also called torr.

The millimeter of water (symbol: mmH₂O or mmH2O) is a non-SI unit of pressure defined as the pressure exerted by a one-millimeter column of water under standard gravity. It is commonly used in ventilation systems, clean rooms, HVAC engineering, and laboratory instruments to measure small pressure differences. Although the pascal is the SI unit of pressure, the millimeter of water remains a practical unit for low-pressure applications. It is based on the concept of a water column.

One millimeter of water is equal to 9.80665 pascals, 0.1 centimeter of water, 0.0000980665 bar, 0.00142233 pounds per square inch, and 0.00980665 kilopascal. The millimeter of water is widely used for measuring very low gas and liquid pressures.

The meter of head (symbol: mH₂O or m head) is a non-SI unit of pressure that represents the pressure generated by a one-meter column of water under standard gravity. It is widely used in hydraulics, water supply systems, pumps, irrigation, and fluid engineering to describe pressure and pump performance. Although the pascal is the SI unit of pressure, the meter of head remains popular because it directly relates pressure to water height. It is based on the principles of hydraulic head.

One meter of head is equal to 9,806.65 pascals, 9.80665 kilopascals, 0.0980665 bar, 1.42233 pounds per square inch, and 3.28084 feet of water. The meter of head is commonly used to specify pump capacity and water system pressure.