Convert Centimeter of water to Millimeter of Water (cmH2O to Millimeter of Water)

Centimeter of water (cmH2O) and Millimeter of Water (Millimeter of Water) are both units of pressure. With the conversion form below, you can effortlessly and accurately convert centimeter of water to millimeter of water. This free online calculator tool makes it simple and easy to perform the conversion from cmH2O unit to the Millimeter of Water 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 centimeter of water (symbol: cmH₂O) is a non-SI unit of pressure defined as the pressure exerted by a one-centimeter column of water under standard gravity. It is widely used in medical equipment, ventilation systems, HVAC engineering, and fluid mechanics because it provides a practical scale for measuring relatively low pressures. The unit is derived from the hydrostatic pressure of water and is described alongside other pressure units in the centimeter of water reference.

One centimeter of water is equal to 98.0665 pascals, 10 millimeters of water, 0.000980665 bar, 0.0142233 psi, and 0.000967841 standard atmosphere. The centimeter of water is commonly used whenever accurate measurement of low pressure is required.

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.