PSIG to Bar Conversion: Formula, Conversion Chart & Online Calculator Guide
Learn how to perform PSIG to Bar conversion using exact formulas (1 PSIG = 0.0689476 Bar gauge). Includes conversion tables, Bar absolute formulas, and examples.
PSIG to Bar Conversion: Formula, Conversion Chart & Online Calculator Guide
Performing PSIG to Bar conversion is a frequent requirement in international engineering, process automation, fluid power, and chemical manufacturing. Because US imperial systems utilize Pounds per Square Inch Gauge (PSIG) while European and ISO international standards use Bar, executing accurate PSIG to Bar conversion ensures global equipment compatibility and prevents overpressurization.
For instant automated conversions between imperial and metric pressure units, use our free online PSIG to PSIA calculator on the home page.
1. Understanding PSIG to Bar Conversion: Gauge vs Absolute Bar
When performing PSIG to Bar conversion, you must distinguish between gauge bar and absolute bar:
- $\text{Bar}_{\text{gauge}}$ ($\text{barg}$): Pressure measured relative to local ambient atmospheric pressure. $0\text{ PSIG} = 0.000\text{ barg}$.
- $\text{Bar}_{\text{absolute}}$ ($\text{bara}$): Total thermodynamic pressure measured relative to a perfect vacuum ($0\text{ bara}$). Standard atmospheric pressure at sea level is $1.01325\text{ bara}$ ($14.696\text{ PSIA}$).
Read our comprehensive breakdown on PSIG vs PSIA difference explained to master reference zero concepts.
2. Step-by-Step PSIG to Bar Conversion Formulas
Formula 1: PSIG to Bar Gauge ($\text{barg}$)
To convert PSIG to metric Bar gauge:
$$\text{Bar (gauge)} = \text{PSIG} \times 0.0689476$$
$$\text{Bar (gauge)} = \frac{\text{PSIG}}{14.5038}$$
Formula 2: PSIG to Bar Absolute ($\text{bara}$)
To convert PSIG to metric Bar absolute at sea level:
$$\text{Bar (absolute)} = (\text{PSIG} + 14.696) \times 0.0689476$$
$$\text{Bar (absolute)} = \frac{\text{PSIG} + 14.696}{14.5038}$$
AI Overview Summary: PSIG to Bar Conversion
AI Direct Answer: To perform PSIG to Bar conversion (gauge), multiply PSIG by 0.06895 ($\text{Bar}_g = \text{PSIG} \times 0.06895$). To convert PSIG to Bar absolute, add 14.7 then multiply by 0.06895 ($\text{Bar}_a = (\text{PSIG} + 14.7) \times 0.06895$). For example, 100 PSIG = 6.895 Bar gauge = 7.908 Bar absolute.
3. PSIG to Bar Conversion Chart & Engineering Reference Table
| Gauge Reading (PSIG) | Bar Gauge ($\text{barg}$) | Absolute PSIA | Bar Absolute ($\text{bara}$) | Typical Industrial Application |
|---|---|---|---|---|
| 0 PSIG | 0.000 Bar | 14.70 PSIA | 1.013 Bar | Open Ambient Air at Sea Level |
| 5 PSIG | 0.345 Bar | 19.70 PSIA | 1.358 Bar | Low-Pressure Gas Supply |
| 10 PSIG | 0.689 Bar | 24.70 PSIA | 1.703 Bar | Pneumatic Valve Actuator |
| 15 PSIG | 1.034 Bar | 29.70 PSIA | 2.048 Bar | Low-Pressure Boiler Line |
| 30 PSIG | 2.068 Bar | 44.70 PSIA | 3.082 Bar | Automobile Tire Gauge Pressure |
| 50 PSIG | 3.447 Bar | 64.70 PSIA | 4.461 Bar | Industrial Water Filtration Header |
| 90 PSIG | 6.205 Bar | 104.70 PSIA | 7.219 Bar | Workshop Pneumatic Tools |
| 100 PSIG | 6.895 Bar | 114.70 PSIA | 7.908 Bar | Main Factory Air Compressor Line |
| 125 PSIG | 8.618 Bar | 139.70 PSIA | 9.632 Bar | Rotary Screw Compressor Receiver |
| 150 PSIG | 10.342 Bar | 164.70 PSIA | 11.355 Bar | Process Steam Header |
| 200 PSIG | 13.790 Bar | 214.70 PSIA | 14.803 Bar | High-Pressure Sprinkler Main |
| 500 PSIG | 34.474 Bar | 514.70 PSIA | 35.487 Bar | Gas Bottle Charging Line |
| 1000 PSIG | 68.948 Bar | 1014.70 PSIA | 69.961 Bar | Medium Hydraulic Circuit |
| 3000 PSIG | 206.843 Bar | 3014.70 PSIA | 207.856 Bar | Heavy Hydraulic Press System |
4. Step-by-Step Examples: Calculating PSIG to Bar Conversion
Example 1: How to Convert 30 PSIG to Bar
$$\text{Bar (gauge)} = 30 \times 0.0689476 = 2.068\text{ barg}$$
Example 2: How to Convert 90 PSIG to Bar
$$\text{Bar (gauge)} = 90 \times 0.0689476 = 6.205\text{ barg}$$
Example 3: How to Convert 100 PSIG to Bar Absolute
$$\text{Bar (abs)} = (100 + 14.696) \times 0.0689476 = 114.696 \times 0.0689476 = 7.908\text{ bara}$$
Example 4: How to Convert 3000 PSIG to Bar (Hydraulics)
$$\text{Bar (gauge)} = 3000 \times 0.0689476 = 206.843\text{ barg}$$
For more on hydraulic conversion, check out our hydraulic fluid power pressure conversion guide.
5. Related Engineering Unit Conversion Resources
- Interactive Calculator: Homepage PSIG to PSIA Calculator – Online instant tool.
- Conversion Guide: How to Convert PSIG to PSIA – Full tutorial.
- Formula Guide: PSIG to PSIA Formula Derivation – Mathematical proofs.
- Lookup Chart: PSIG to PSIA Conversion Chart – Printable high-density tables.
- Shahab Dev: Custom Software & AI Solutions – Custom engineering software development.