MPA to PSIG Converter
Convert megapascals to gauge pressure in PSIG with instant bidirectional results.
What Is the MPa to PSIG Converter?
The MPa to PSIG Converter converts megapascals (MPa) to pounds per square inch gauge (psig) and back. PSIG measures gauge pressure relative to atmospheric pressure, which is how most pressure gauges and industrial equipment report readings. MPa is the SI unit used for material strength and hydraulic system design.
Conversion Formula
To convert MPa to psig:
$$\text{psig} = \text{MPa} \times 130.3418$$
To convert psig to MPa:
$$\text{MPa} = \frac{\text{psig}}{130.3418}$$
PSIG differs from absolute psi because gauge pressure subtracts atmospheric pressure (approximately 14.696 psi at sea level). The conversion factor 130.3418 accounts for this difference when converting from MPa to gauge pressure.
PSIG vs PSI
Absolute pressure (psi) is measured from a perfect vacuum. Gauge pressure (psig) is measured relative to the local atmosphere. A tire gauge reading 32 psig means the tire is 32 psi above atmospheric pressure. To convert MPa to absolute psi, use our MPa to PSI Converter.
Quick Reference
| MPa | psig | Typical Use |
|---|---|---|
| 0.1 | 13.03 | Low gauge pressure |
| 1 | 130.34 | General reference |
| 1.52 | 198 | Car tire gauge (~32 psig) |
| 20 | 2606.84 | High-pressure vessel |
Related tools: MPa to PSI Converter, MPa Converter, kPa to PSI Converter, and Pressure Converter.
Frequently Asked Questions
How many psig is 1 MPa?
1 MPa equals approximately 130.3418 psig. This accounts for the difference between absolute pressure and gauge pressure relative to atmospheric conditions.
How do I convert MPa to psig?
Multiply the MPa value by 130.3418. For example, 2 MPa equals about 260.68 psig. Enter a value in either field for instant bidirectional conversion.
What is the difference between psig and psi?
PSI is absolute pressure from a vacuum reference. PSIG is gauge pressure measured above local atmospheric pressure. Most pressure gauges display psig, not absolute psi.
How do I convert psig to MPa?
Divide psig by 130.3418. For example, 130.3418 psig equals 1 MPa. Type the psig value in the gauge pressure field and the MPa field updates automatically.
Why is the MPa to psig factor different from MPa to psi?
The MPa to psi factor is 145.038 for absolute pressure. The MPa to psig factor is 130.3418 because gauge pressure excludes atmospheric pressure. The difference reflects the approximately 0.101325 MPa (14.696 psi) of atmospheric pressure at sea level.
When should I use psig instead of psi?
Use psig when reading pressure gauges, tire pressure, compressed air systems, and industrial equipment that measures pressure above atmosphere. Use absolute psi for scientific calculations involving vacuum or total pressure.
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