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Pressure Conversion Formula:
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The In Hg to PSI conversion is used to convert pressure measurements from inches of mercury (inHg) to pounds per square inch (PSI). This conversion is commonly used in meteorology, aviation, engineering, and various industrial applications where pressure measurements need to be converted between different units.
The calculator uses the conversion formula:
Where:
Explanation: The conversion factor 0.491 is derived from the relationship between mercury column height and pressure, taking into account the density of mercury and gravitational acceleration.
Details: Accurate pressure conversion is essential in various fields including weather forecasting, aviation altimetry, HVAC systems, industrial processes, and scientific research where different pressure units are used interchangeably.
Tips: Enter the pressure value in inches of mercury (inHg). The value must be positive and greater than zero. The calculator will automatically convert it to pounds per square inch (PSI) with four decimal places precision.
Q1: What is inches of mercury (inHg)?
A: Inches of mercury is a unit of pressure measurement based on the height of a mercury column in a barometer. It is commonly used in meteorology and aviation.
Q2: What is PSI?
A: PSI stands for pounds per square inch, a unit of pressure commonly used in the United States and other countries for measuring pressure in various applications including tire pressure, hydraulic systems, and industrial equipment.
Q3: Why is the conversion factor 0.491?
A: The factor 0.491 comes from the relationship: 1 inch of mercury = 0.491154 pounds per square inch, based on the density of mercury (13.5951 g/cm³) and standard gravity.
Q4: Where is this conversion commonly used?
A: This conversion is frequently used in weather reporting (barometric pressure), aviation (altimeter settings), HVAC systems, and industrial pressure measurements.
Q5: Are there other common pressure units?
A: Yes, other common pressure units include atmospheres (atm), millimeters of mercury (mmHg), kilopascals (kPa), bars, and torr, each with their specific conversion factors.