1. What is a PSIG to PSI Converter?

Definition: This tool converts gauge pressure (PSIG) to absolute pressure (PSI) by adding atmospheric pressure.

Purpose: It helps engineers, technicians, and students accurately convert between these common pressure measurements.

2. How Does the Converter Work?

The converter uses the formula:

Where:

• \( \text{PSI} \) — Absolute pressure (pounds per square inch absolute)
• \( \text{PSIG} \) — Gauge pressure (pounds per square inch gauge)
• \( 14.7 \) — Standard atmospheric pressure at sea level (psi)

Explanation: Gauge pressure measures pressure relative to atmospheric pressure, while absolute pressure includes atmospheric pressure.

3. Importance of Pressure Conversion

Details: Proper conversion is essential for accurate calculations in engineering systems, fluid dynamics, and when working with pressure-sensitive equipment.

4. Using the Converter

Tips: Simply enter the PSIG value you want to convert. The tool will automatically add 14.7 psi to convert to absolute pressure.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between PSI and PSIG?
A: PSI is absolute pressure (including atmospheric pressure), while PSIG is gauge pressure (excluding atmospheric pressure).

Q2: Why is 14.7 psi used in the formula?
A: This represents standard atmospheric pressure at sea level. Actual atmospheric pressure may vary slightly with altitude and weather.

Q3: Can PSIG be negative?
A: Yes, negative PSIG indicates vacuum conditions (pressure below atmospheric).

Q4: When would I need to make this conversion?
A: When working with equations that require absolute pressure (like gas laws) or when comparing measurements from different pressure scales.

Q5: Is the conversion factor always 14.7?
A: At sea level under standard conditions, yes. For high-altitude locations, a slightly lower value may be more accurate.