Megapascals to Atmospheres Converter
Enter the pressure in megapascals below to convert it to atmospheres.
Convert Megapascals to Atmospheres
Enter a value in megapascals (MPa) to convert to atmospheres (atm).
Megapascal to Standard Atmosphere Conversion Table
Table showing various megapascal measurements converted to atmospheres. Click any preset value or arrow to load it into the converter.
| Megapascals (MPa) | Atmospheres (atm) |
|---|---|
| 1 MPa | 9.8692327 atm |
| 2 MPa | 19.7384653 atm |
| 2.5 MPa | 24.6730817 atm |
| 5 MPa | 49.3461633 atm |
| 10 MPa | 98.6923267 atm |
| 15 MPa | 148.03849 atm |
| 20 MPa | 197.3846533 atm |
| 25 MPa | 246.7308167 atm |
| 30 MPa | 296.07698 atm |
| 50 MPa | 493.4616334 atm |
How to Convert Megapascals to Atmospheres
To convert megapascals to atmospheres, multiply the pressure by the following conversion ratio: 9.8692327 atmospheres/megapascal.
Since one megapascal is equal to 9.8692327 atmospheres, you can use this simple formula to convert:
The pressure in atmospheres is equal to the pressure in megapascals multiplied by 9.8692327.
For example, here's how to convert 5 megapascals to atmospheres using the formula above.
How Many Atmospheres Are in a Megapascal?
There are 9.8692327 atmospheres in a megapascal, which is why we use this value in the formula above.
Our megapascal to standard atmosphere calculator automatically converts your pressure measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Megapascals and atmospheres are both units used to measure pressure. Keep reading to learn more about each unit.
What Is a Megapascal?
A megapascal is a unit of pressure equal to 1,000,000 pascals (Pa), the base unit for pressure. Equal to 1,000,000 Pascals (identically 1 N/mm²). [1]
The megapascal is classified as an International System of Units (SI) unit of pressure. Megapascals can be abbreviated as MPa; for example, 1 megapascal can be written as 1 MPa.
In the metric system, "mega" is the standard SI prefix for millions, or 10⁶. This makes the megapascal (MPa) a convenient decimal multiple of the pascal (Pa).
In practice, megapascals (MPa) are widely used across large-scale industrial, bulk, and macro-level pressure specifications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a Standard Atmosphere?
A standard atmosphere is a unit of pressure equal to 101,325 pascals (Pa), the base unit for pressure. Standard sea-level atmospheric pressure defined as 101,325 Pascals. [2]
The standard atmosphere is classified as a standard unit of pressure. Atmospheres can be abbreviated as atm; for example, 1 standard atmosphere can be written as 1 atm.
When working with atmospheres (atm) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, atmospheres (atm) are widely used across large-scale industrial, bulk, and macro-level pressure specifications within international standard workflows, engineering documentation, and technical data sheets.
When converting pressure between megapascals (MPa) and atmospheres (atm), keep full floating-point precision (1 MPa = 9.8692327 atm; 1 atm = 0.101325 MPa) during intermediate calculations and round only the final standard atmosphere figure to match your instrument tolerance.
More Megapascal & Standard Atmosphere Conversions
Need to calculate in the opposite direction? Use our atmospheres to megapascals calculator to switch your starting unit immediately. You can also explore related tools such as converting atmospheres to megapascals, converting bars to atmospheres, or converting torr to atmospheres.
Convert from Megapascals
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))·Pressure Metrology Standard — Megapascals (MPa) to Atmospheres (atm)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Pascal (Pa))·Unit Specifications: Megapascal (MPa) & Standard Atmosphere (atm)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Mechanics)·Conversion Factors & Mathematical Basis (MPa to atm)