1. What is PSIG to PSI Conversion?

PSIG to PSI conversion is the process of converting gauge pressure (PSIG) to absolute pressure (PSI) at sea level. Gauge pressure is measured relative to atmospheric pressure, while absolute pressure includes atmospheric pressure.

2. How Does the Calculator Work?

The calculator uses the pressure conversion formula:

Where:

• \( PSI \) — Absolute pressure (psia)
• \( PSIG \) — Gauge pressure (psig)
• \( 14.7 \) — Standard atmospheric pressure at sea level (psi)

Explanation: This formula converts gauge pressure readings to absolute pressure by adding the standard atmospheric pressure at sea level.

3. Importance of Pressure Conversion

Details: Accurate pressure conversion is crucial for engineering calculations, fluid dynamics, HVAC systems, and various industrial applications where absolute pressure measurements are required.

4. Using the Calculator

Tips: Enter gauge pressure in PSIG units. The calculator will automatically convert to absolute pressure in PSI. The result is accurate for sea level conditions.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between PSIG and PSI?
A: PSIG is gauge pressure (relative to atmospheric pressure), while PSI typically refers to absolute pressure that includes atmospheric pressure.

Q2: Why is 14.7 used in the conversion?
A: 14.7 psi represents the standard atmospheric pressure at sea level under standard conditions.

Q3: Does atmospheric pressure change with altitude?
A: Yes, atmospheric pressure decreases with increasing altitude. The 14.7 psi value is specific to sea level conditions.

Q4: When is absolute pressure used vs gauge pressure?
A: Absolute pressure is used in scientific calculations, thermodynamics, and weather systems. Gauge pressure is commonly used in industrial applications and pressure gauges.

Q5: Can this calculator be used for vacuum pressure?
A: Yes, for vacuum pressures (negative PSIG values), the formula still applies and will give absolute pressures below atmospheric pressure.