Convert Centimeter of Mercury to Petapascal (cmHg to Petapascal)

Centimeter of Mercury (cmHg) and Petapascal (Petapascal) are both units of pressure. With the conversion form below, you can effortlessly and accurately convert centimeter of mercury to petapascal. This free online calculator tool makes it simple and easy to perform the conversion from cmHg unit to the Petapascal 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 mercury (symbol: cmHg) is a non-SI unit of pressure based on the pressure exerted by a one-centimeter column of mercury under standard gravity. It has traditionally been used in scientific instruments, laboratory measurements, and vacuum systems. Although the pascal is the SI unit of pressure, the centimeter of mercury is still encountered in specialized applications. It is closely related to the Torr and other mercury-based pressure units.

One centimeter of mercury is equal to 1,333.22 pascals, 10 millimeters of mercury, 0.0133322 bar, 0.193367 psi, and 0.0131579 standard atmosphere. This unit remains useful for comparing pressure values in traditional measurement systems.

The petapascal (symbol: PPa) is an SI-derived unit of pressure equal to one quadrillion (10¹⁵) pascals. It is an extremely large pressure unit used primarily in astrophysics, geophysics, high-energy physics, and theoretical research involving exceptionally high pressures. The petapascal uses the SI prefix peta, representing a factor of 10¹⁵.

One petapascal is equal to 1,000 terapascals, 1,000,000 gigapascals, 1,000,000,000 megapascals, 10,000,000,000 bars, and 1×10¹⁵ pascals. Although rarely encountered outside advanced scientific research, the petapascal is part of the complete SI pressure scale.