Inhg To Psia Calculator

Pressure Conversion Formula:

\[ \text{PSIA} = \text{inHg} \times 0.491154 \]

Pounds per Square Inch Absolute (PSIA):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is an InHg to PSIA Calculator?

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

Purpose: It helps engineers, meteorologists, and technicians convert between these common pressure units used in various applications.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \text{PSIA} = \text{inHg} \times 0.491154 \]

Where:

\( \text{PSIA} \) — Pounds per square inch absolute
\( \text{inHg} \) — Inches of mercury
\( 0.491154 \) — Conversion factor (exact value)

Explanation: This conversion factor is derived from the standard atmospheric pressure definitions (29.92 inHg = 14.6959 PSIA).

3. Importance of Pressure Unit Conversion

Details: Accurate pressure conversion is crucial in aviation, meteorology, HVAC systems, and industrial processes where different units are standard.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between PSIA and PSIG?
A: PSIA is absolute pressure (relative to vacuum), while PSIG is gauge pressure (relative to atmospheric pressure).

Q2: Where is inHg commonly used?
A: Inches of mercury is commonly used in meteorology, aviation, and some industrial applications.

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

Q4: Why 6 decimal places in the result?
A: The conversion factor is exact, so we show full precision for technical accuracy.

Q5: Can I convert PSIA back to inHg?
A: Yes, use the inverse formula: inHg = PSIA / 0.491154.