Atmospheres (atm) to Megapascals (MPa) Conversion
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
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 (atm) | Megapascals (MPa) |
|---|---|
| 0.1 atm | 0.0101325 MPa |
| 1 atm | 0.101325 MPa |
| 2 atm | 0.20265 MPa |
| 3 atm | 0.303975 MPa |
| 5 atm | 0.506625 MPa |
| 10 atm | 1.01325 MPa |
| 20 atm | 2.0265 MPa |
| 30 atm | 3.03975 MPa |
| 50 atm | 5.06625 MPa |
| 100 atm | 10.1325 MPa |
| 1000 atm | 101.325 MPa |
Frequently Asked Questions (FAQ)
How many megapascals are in 1 atmospheres?
1 atmospheres (atm) is exactly 0.101325 megapascals (MPa).
How do I convert atmospheres to megapascals?
Multiply the value in atmospheres by 0.101325 to get the result in megapascals. Or use the converter above — type any number and see the result instantly.