1. What is an inHg to psi Calculator?

Definition: This calculator converts pressure measurements from inches of mercury (inHg) to pounds per square inch (psi).

Purpose: It helps engineers, meteorologists, and technicians work with pressure measurements across different unit systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{psi} \) — Pressure in pounds per square inch (psi)
• \( P_{inHg} \) — Pressure in inches of mercury (inHg)
• 0.491154 — Conversion factor (1 inHg = 0.491154 psi)

Explanation: The conversion factor is derived from the standard atmospheric pressure definitions of both units.

3. Importance of Pressure Unit Conversion

Details: Accurate pressure conversions are crucial in fields like meteorology, aviation, engineering, and industrial processes where different measurement systems are used.

4. Using the Calculator

Tips: Simply enter the pressure value in inches of mercury (inHg) and the calculator will provide the equivalent in pounds per square inch (psi).

5. Frequently Asked Questions (FAQ)

Q1: What is inches of mercury (inHg)?
A: inHg is a unit of pressure based on the height of a mercury column that the pressure could support in a mercury barometer.

Q2: Where is inHg commonly used?
A: inHg is often used in meteorology, aviation, and some industrial applications, particularly in the United States.

Q3: What is the standard atmospheric pressure in these units?
A: Standard atmospheric pressure is 29.92 inHg or 14.6959 psi.

Q4: Why is the conversion factor 0.491154?
A: This comes from the definition of standard atmospheric pressure and the density of mercury at 0°C (32°F).

Q5: How precise is this conversion?
A: The conversion factor is precise to six decimal places, suitable for most practical applications.