Megapascals to PSIG Converter
Unit ConversionConvert a megapascal gauge reading to psig. For gauge readings, 1 megapascal is about 145.037738 psi, and vacuum readings are accepted down to a full vacuum.
PSIG
Equivalent gauge pressure in psig
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SponsoredThis converter turns megapascals into psi (MPa to psi). Enter a value and the result updates as you type. 1 megapascal is about 145.037738 psi.
Megapascal gauge readings (MPag) are common on hydraulic equipment and gas cylinders, while US gauges read psig. Both are gauge pressures, measured from the surrounding air, so the conversion only changes the unit, not the zero point. 1 MPa is about 145.0377 psi.
Gauge readings below the surrounding air are negative, so negative values are accepted down to a full vacuum, about -0.101325 MPa (-14.7 psig). Below that the result shows a dash, because no pressure is lower than a perfect vacuum. The result is rounded to 3 decimal places.
How to Convert Megapascals to PSIG
To convert megapascals gauge to psig, multiply by about 145.0377. For example, 20 MPag is about 2,900.755 psig.
To go from psig back to megapascals gauge, divide psig by about 145.0377.
Megapascals to PSIG Conversion Table
Common MPa gauge values converted to psig, rounded to 3 decimal places.
| Megapascals | PSIG |
|---|---|
| -0.1 MPag | -14.504 psig |
| 0.1 MPag | 14.504 psig |
| 0.2 MPag | 29.008 psig |
| 0.5 MPag | 72.519 psig |
| 0.7 MPag | 101.526 psig |
| 1 MPag | 145.038 psig |
| 1.5 MPag | 217.557 psig |
| 2 MPag | 290.075 psig |
| 3 MPag | 435.113 psig |
| 5 MPag | 725.189 psig |
| 10 MPag | 1,450.377 psig |
| 20 MPag | 2,900.755 psig |
| 35 MPag | 5,076.321 psig |
| 70 MPag | 10,152.642 psig |
Gauge Pressure in MPa and PSIG
The g in MPag and psig marks a gauge reading: 0 means the same pressure as the surrounding air. Converting units keeps it a gauge reading, so 1 MPag is about 145.0377 psig, not psia. To get absolute pressure, add the local air pressure after converting, about 14.7 psi at sea level.
For example, an air compressor rated at 1.6 MPa gauge is about 232.06 psig, and a 0.7 MPa rating is about 101.53 psig.
Hydraulic pressure and pipe size together set how fast fluid moves, which the Fluid Flow Rate Calculator works out from cross-sectional areas. Engine cranking pressure is another gauge reading in psi, estimated by the Compression Ratio to PSI Calculator.
Frequently Asked Questions
What is 1.6 MPa in psig?
1.6 MPa gauge is about 232.06 psig.
Is MPa to psig different from MPa to psi?
The factor is the same. The difference is only the label: psig says the reading is gauge pressure. Use this page when the MPa value is also a gauge reading.
How do I convert psig to MPa gauge?
Divide psig by about 145.0377. For example, 3,000 psig is about 20.684 MPa gauge.
Is the Megapascals to PSIG factor exact?
The factor is fixed by definitions, so it never changes, but it has no finite decimal form. 1 megapascal is about 145.037738 psi. The calculator uses the full value and rounds only the result it shows.
Can I enter a negative value?
Yes. A negative gauge reading is a partial vacuum. The lowest possible value is a full vacuum, about -0.101325 MPa (-14.7 psig) at standard air pressure, so lower values show a dash instead of a result.
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