Psig To Psi Calculator

PSI Conversion Formula:

\[ PSI = PSIG + 14.7 \]

Absolute Pressure (PSI):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is PSIG to PSI Conversion?

The PSIG to PSI conversion converts gauge pressure to absolute pressure by adding atmospheric pressure at sea level. PSIG measures pressure relative to atmospheric pressure, while PSI measures absolute pressure including atmospheric pressure.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

\[ PSI = PSIG + 14.7 \]

Where:

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

Explanation: This conversion accounts for the atmospheric pressure that exists at sea level, converting relative pressure measurements to absolute pressure values.

3. Importance of Pressure Conversion

Details: Accurate pressure conversion is crucial for engineering calculations, fluid dynamics, HVAC systems, and industrial processes where absolute pressure values are required for precise measurements and safety standards.

4. Using the Calculator

Tips: Enter gauge pressure in PSIG units. The calculator will automatically convert to absolute PSI. Ensure input values are valid numerical values.

5. Frequently Asked Questions (FAQ)

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

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

Q3: Does atmospheric pressure change with altitude?
A: Yes, atmospheric pressure decreases with increasing altitude. This calculator uses sea level standard pressure.

Q4: When should I use absolute vs gauge pressure?
A: Use absolute pressure for scientific calculations and gauge pressure for most industrial and mechanical applications.

Q5: Can this calculator handle negative PSIG values?
A: Yes, the calculator can process negative PSIG values (vacuum conditions) and convert them to corresponding absolute pressure values.