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 | 0.9869 atm |
| 1 MPa | 9.8692 atm |
| 2 MPa | 19.7385 atm |
| 3 MPa | 29.6077 atm |
| 5 MPa | 49.3462 atm |
| 10 MPa | 98.6923 atm |
| 20 MPa | 197.3847 atm |
| 30 MPa | 296.077 atm |
| 50 MPa | 493.4616 atm |
| 100 MPa | 986.9233 atm |
| 1000 MPa | 9,869.2327 atm |
Frequently Asked Questions (FAQ)
How many atmospheres are in 1 megapascals?
1 megapascals (MPa) is exactly 9.8692 atmospheres (atm).
How do I convert megapascals to atmospheres?
Multiply the value in megapascals by 9.8692 to get the result in atmospheres. Or use the converter above — type any number and see the result instantly.