How to convert pressure units | Pa, mmH,. Torr, psi, atm

In the fields of fluid dynamics and thermodynamics, pressure is a critical parameter that defines the force exerted per unit area. Different industries and scientific disciplines use different units to measure pressure, creating the need for accurate and efficient unit conversions. In this blog post, we’ll explore the conversion between some common pressure units: Pascal (Pa), millimeters of mercury (mmHg), Torr, pounds per square inch (psi), and atmospheres (atm).

1. Pascal (Pa): The pascal is the SI unit for pressure and is defined as one newton per square meter. It’s the standard unit used in most scientific and engineering contexts.
2. Millimeters of Mercury (mmHg) and Torr: Millimeters of mercury (mmHg) and torr are often used interchangeably. Both represent the height of a mercury column in a barometer under standard conditions. The conversion factor is straightforward: 1 mmHg = 1 torr.
3. Pounds per Square Inch (psi): Pounds per square inch is a unit commonly used in the United States and engineering applications. To convert psi to pascal, the conversion factor is approximately 6894.76 Pa per psi.
4. Atmosphere (atm): The atmosphere is a unit of pressure based on the average atmospheric pressure at sea level on Earth. One atmosphere is approximately 101325 Pa.

Pressure Conversion Formulas:

• 1 Pa=0.0075 mmHg or torr
• 1 mmHg or torr=133.322 Pa1
• 1 psi=6894.76 Pa
• 1 atm=101325 Pa