What Is a Megapascal?
A megapascal, written MPa, is a metric pressure unit equal to 1,000,000 pascals or 1,000 kilopascals. Some users search for this as mega pascales or mega pascal, but the standard spelling is megapascal.
MPa to PSI Formula
To convert MPa to PSI, multiply the MPa value by 145.0377. For example, 20 MPa x 145.0377 = 2,900.75 psi.
PSI to MPa Formula
To convert PSI to MPa, divide the PSI value by 145.0377. For example, 3,000 psi divided by 145.0377 is about 20.684 MPa.
MPa to Bar, kPa, and Pa
The metric relationships are simple: 1 MPa = 10 bar = 1,000 kPa = 1,000,000 Pa. These conversions are common in engineering, hydraulic systems, pressure washers, cylinders, compressors, and material stress specifications.
Common MPa to PSI Conversion Chart
Where MPa Is Commonly Used
MPa appears in international engineering documents, hydraulic equipment, pressure washer ratings, material strength, cylinder pressure, compressor specifications, and metric equipment manuals. PSI is more common on U.S. pressure gauges and many North American product labels.
Gauge Pressure vs Absolute Pressure
MPa and PSI can describe either gauge pressure or absolute pressure. Convert MPa(g) to psig, or MPa absolute to psia, but avoid mixing gauge and absolute values unless you also account for atmospheric pressure.