PSI to Megapascals Converter
Enter the pressure in psi below to convert it to megapascals.
Convert PSI to Megapascals
Enter a value in psi (psi) to convert to megapascals (MPa).
Pounds per Square Inch to Megapascal Conversion Table
Table showing various pounds per square inch measurements converted to megapascals. Click any preset value or arrow to load it into the converter.
| PSI (psi) | Megapascals (MPa) |
|---|---|
| 1 psi | 0.0068948 MPa |
| 2 psi | 0.0137895 MPa |
| 5 psi | 0.0344738 MPa |
| 10 psi | 0.0689476 MPa |
| 15 psi | 0.1034214 MPa |
| 20 psi | 0.1378951 MPa |
| 25 psi | 0.1723689 MPa |
| 30 psi | 0.2068427 MPa |
| 50 psi | 0.3447379 MPa |
| 75 psi | 0.5171068 MPa |
How to Convert PSI to Megapascals
To convert psi to megapascals, multiply the pressure by the following conversion ratio: 0.0068948 megapascals/pounds per square inch.
Since one pounds per square inch is equal to 0.0068948 megapascals, you can use this simple formula to convert:
The pressure in megapascals is equal to the pressure in psi multiplied by 0.0068948.
For example, here's how to convert 3000 psi to megapascals using the formula above.
How Many Megapascals Are in a Pounds per Square Inch?
There are 0.0068948 megapascals in a pounds per square inch, which is why we use this value in the formula above.
Our pounds per square inch to megapascal calculator automatically converts your pressure measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
PSI and megapascals are both units used to measure pressure. Keep reading to learn more about each unit.
What Is a Pounds per Square Inch?
A pounds per square inch is a unit of pressure equal to 6,894.7572932 pascals (Pa), the base unit for pressure. Imperial & US pressure unit equal to 1 pound-force per square inch (6.89476 kPa). [1]
The pounds per square inch is classified as a US customary and imperial unit of pressure. PSI can be abbreviated as psi; for example, 1 pounds per square inch can be written as 1 psi.
When working with psi (psi) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, psi (psi) are widely used across large-scale industrial, bulk, and macro-level pressure specifications within US customary and imperial workflows, engineering documentation, and technical data sheets.
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). [2]
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.
When converting pressure between psi (psi) and megapascals (MPa), keep full floating-point precision (1 psi = 0.0068948 MPa; 1 MPa = 145.0377377 psi) during intermediate calculations and round only the final megapascal figure to match your instrument tolerance.
More Pounds per Square Inch & Megapascal Conversions
Need to calculate in the opposite direction? Use our megapascals to psi converter (MPa to psi) to switch your starting unit immediately. You can also explore related tools such as converting pascals to megapascals, converting bars to megapascals, or converting psi to bars.
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))·Pressure Metrology Standard — PSI (psi) to Megapascals (MPa)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Pascal (Pa))·Unit Specifications: Pounds per Square Inch (psi) & Megapascal (MPa)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Mechanics)·Conversion Factors & Mathematical Basis (psi to MPa)