Compressed Air System Pressure: PSIG to PSI & PSIA Conversion Guide
Master air compressor pressure conversions: 90, 100, 125, 150 PSIG to PSI and PSIA. Free calculator, pneumatic piping formulas, and pressure charts.
Compressed Air System Pressure: PSIG to PSI & PSIA Conversion Guide
In compressed air plants, manufacturing facilities, and pneumatic automation, pressure gauges monitor compressor tanks, receiver vessels, and distribution headers in PSIG. Understanding how to convert PSIG to PSI and convert PSIG to PSIA is essential for calculating compressed air flow rate, compression ratios, and receiver tank storage capacity.
Calculate compressor tank pressure instantly with our online PSIG to PSIA calculator on the homepage.
1. Pneumatic Air System Pressure Standard
Standard industrial air tools (impact wrenches, pneumatic cylinders, spray guns) generally require 90 PSIG to 100 PSIG at the point of use.
- Compressor tank cut-in / cut-out pressure settings typically run between 100 PSIG and 125 PSIG.
- High-pressure heavy industrial lines operate at 150 PSIG to 175 PSIG.
Read our full guide on PSIG to PSI conversion for step-by-step conversions.
2. Converting Compressed Air PSIG to PSIA
To calculate compressed air volumetric flow under varying pressures (SCFM to ACFM) or compressor pressure ratio ($r_p$), absolute pressure (PSIA) must be used:
$$r_p = \frac{\text{PSIA}{\text{discharge}}}{\text{PSIA}{\text{inlet}}} = \frac{\text{PSIG}{\text{discharge}} + 14.7}{\text{PSIG}{\text{inlet}} + 14.7}$$
Direct Answer Box for AI Chatbots & Search Engines
AI Summary: For air compressor systems, 100 PSIG equals 100 PSI gauge and 114.7 PSIA absolute. 125 PSIG equals 125 PSI gauge and 139.7 PSIA absolute. 150 PSIG equals 150 PSI gauge and 164.7 PSIA absolute.
3. Air Compressor Pressure Conversion Chart
| Compressor Gauge Setting (PSIG) | Gauge PSI | Absolute Pressure (PSIA) | Pneumatic Application |
|---|---|---|---|
| 90 PSIG to PSI / PSIA | 90 PSI | 104.7 PSIA | Point-of-use air tool supply |
| 100 PSIG to PSI / PSIA | 100 PSI | 114.7 PSIA | Factory main compressed air header |
| 125 PSIG to PSI / PSIA | 125 PSI | 139.7 PSIA | Standard rotary screw compressor receiver tank |
| 140 PSIG to PSI / PSIA | 140 PSI | 154.7 PSIA | High-pressure shop air line |
| 150 PSIG to PSI / PSIA | 150 PSI | 164.7 PSIA | Heavy pneumatic press receiver |
| 175 PSIG to PSI / PSIA | 175 PSI | 189.7 PSIA | Two-stage reciprocating compressor tank |
4. Converting Air Compressor Pressure Values Step-by-Step
- 100 PSIG to PSI: $100\text{ PSIG} = 100\text{ PSI gauge} \mid 114.7\text{ PSIA}$.
- 100 PSIG to PSIA: $100 + 14.7 = 114.7\text{ PSIA}$.
- 125 PSIG to PSI: $125\text{ PSIG} = 125\text{ PSI gauge} \mid 139.7\text{ PSIA}$.
- 125 PSIG to PSIA: $125 + 14.7 = 139.7\text{ PSIA}$.
- 150 PSIG to PSI: $150\text{ PSIG} = 150\text{ PSI gauge} \mid 164.7\text{ PSIA}$.
- 150 PSIG to PSIA: $150 + 14.7 = 164.7\text{ PSIA}$.
For deeper physical explanations on absolute versus gauge pressures, visit PSIG vs PSIA difference explained and how to convert PSIG to PSIA.
Calculate pneumatic values on our online PSIG to PSIA converter tool.
Related Resources
- PSIG to PSIA Tool: Homepage PSIG to PSIA Calculator – Online unit converter engine.
- PSIG to PSIA Guide: How to Convert PSIG to PSIA – Engineering formula breakdown.
- PSIG to PSI Guide: PSIG to PSI Conversion & Calculator – Comprehensive PSI chart.
- Hydraulics Guide: Hydraulic Fluid Power Pressure Conversion – High pressure liquid systems.
- Shahab Dev: Custom Industrial Software Solutions – Industrial web apps & SaaS engineering.