Megapascals (MPa) to Atmospheres (atm) 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.
Atmospheres
The standard atmosphere (atm) is a unit of pressure defined as exactly 101,325 Pa, representing the approximate mean atmospheric pressure at sea level. It remains in use in chemistry for expressing gas pressures in thermodynamic tables and standard conditions (STP: 0 °C and 1 atm). One atmosphere supports a mercury column of exactly 760 mm — the basis of the mercury barometer invented by Torricelli in 1643. In deep-sea diving, pressure is expressed in atmospheres absolute (ATA).
| Megapascals (MPa) | Atmospheres (atm) |
|---|---|
| 0.1 MPa | 0.98692326671601 atm |
| 1 MPa | 9.8692326671601 atm |
| 2 MPa | 19.73846533432 atm |
| 3 MPa | 29.60769800148 atm |
| 5 MPa | 49.346163335801 atm |
| 10 MPa | 98.692326671601 atm |
| 20 MPa | 197.3846533432 atm |
| 30 MPa | 296.0769800148 atm |
| 50 MPa | 493.46163335801 atm |
| 100 MPa | 986.92326671601 atm |
| 1000 MPa | 9869.2326671601 atm |