Megapascals (MPa) to Pounds per square inch (psi) Conversion
Megapascals
The megapascal (MPa) is a unit of pressure equal to exactly 1,000,000 pascals (10⁶ Pa) and is the standard unit for expressing material strength, hydraulic system pressure, and structural loading in engineering. The tensile strength of structural steel is approximately 400–600 MPa; high-strength carbon fibre composites can exceed 3,500 MPa. Hydraulic systems in heavy machinery operate at 20–70 MPa. In geology, lithostatic pressure in the Earth's crust is measured in MPa and GPa.
Pounds per square inch
Pounds per square inch (psi) is a unit of pressure defined as one pound-force per square inch (approximately 6,894.76 Pa). It is the standard for tyre pressure, hydraulic systems, and gas cylinders in the United States. Standard atmospheric pressure is approximately 14.696 psi. In engineering, gauge pressure (psig — relative to atmosphere) is distinguished from absolute pressure (psia — relative to a perfect vacuum), a distinction critical in thermodynamics and fluid system design.
| Megapascals (MPa) | Pounds per square inch (psi) |
|---|---|
| 0.1 MPa | 14.503773773022 psi |
| 1 MPa | 145.03773773022 psi |
| 2 MPa | 290.07547546043 psi |
| 3 MPa | 435.11321319065 psi |
| 5 MPa | 725.18868865108 psi |
| 10 MPa | 1450.3773773022 psi |
| 20 MPa | 2900.7547546043 psi |
| 30 MPa | 4351.1321319065 psi |
| 50 MPa | 7251.8868865108 psi |
| 100 MPa | 14503.773773022 psi |
| 1000 MPa | 145037.73773022 psi |