1. What is inHg to psi Conversion?

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

Purpose: It's commonly used in meteorology, aviation, and engineering to convert between these pressure units.

2. How Does the Conversion Work?

The conversion uses the formula:

Where:

• \( P_{psi} \) — Pressure in pounds per square inch (psi)
• \( inHg \) — Pressure in inches of mercury

Explanation: The conversion factor 0.491154 comes from the standard atmospheric pressure definitions (1 atm = 29.9213 inHg = 14.6959 psi).

3. Importance of Pressure Unit Conversion

Details: Accurate pressure conversions are critical in weather forecasting, aircraft performance calculations, and various industrial processes.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

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

Q2: Where is inHg commonly used?
A: Primarily in meteorology (weather reports) and aviation (altimeter settings).

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

Q4: Why is the conversion factor 0.491154?
A: It's derived from the ratio between psi and inHg in standard atmospheric pressure definitions.

Q5: How precise is this conversion?
A: The calculator provides results to 6 decimal places for high precision applications.