MPa to PSI Converter: Convert Megapascal to Pounds per Square Inch
Easily convert megapascals (MPa) to pounds per square inch (psi) using this tool. Perfect for engineers, technicians, and professionals working with high-pressure systems.
Understanding the Conversion from Megapascal to PSI
Pressure is a key measurement in engineering, material science, fluid mechanics, and industrial operations. The megapascal (MPa) and pounds per square inch (psi) are both commonly used units of pressure, but they belong to different measurement systems. The MPa is a metric unit from the International System of Units (SI), while psi is part of the imperial system used mainly in the United States. Converting from MPa to psi ensures compatibility across international projects, technical documentation, and equipment design.
What Is a Megapascal (MPa)?
The megapascal is a unit of pressure equal to one million pascals (Pa). It is commonly used to measure high pressures in engineering applications such as hydraulic systems, structural stress testing, material strength, and fluid power. 1 MPa equals 1,000,000 pascals or 1,000 kilopascals (kPa). The use of MPa provides a convenient and compact way to express large pressure values in technical contexts.
What Is PSI (Pounds per Square Inch)?
PSI stands for pounds per square inch. It is an imperial unit of pressure defined as one pound-force applied to an area of one square inch. PSI is frequently used in the United States, especially in automotive systems (e.g., tire pressures), HVAC equipment, hydraulics, and industrial machinery. Despite the global trend toward metrication, psi remains widely adopted in various industries, making conversions like MPa to psi essential.
Conversion Formula
PSI = MPa × 145.0377
Example: 1 MPa × 145.0377 = 145.04 psiMPa to PSI Conversion Table
| MPa | PSI |
|---|---|
| 0.1 | 14.50 |
| 0.5 | 72.52 |
| 1 | 145.04 |
| 2 | 290.08 |
| 5 | 725.19 |
| 10 | 1450.38 |
| 20 | 2900.75 |
Why Convert MPa to PSI?
- International Engineering Projects: When collaborating globally, conversions from MPa to psi are necessary for compatibility with U.S.-based systems.
- Hydraulics and Pneumatics: PSI is often used in hydraulic component ratings, while MPa is used in engineering calculations.
- Material Testing: Stress and pressure ratings for materials might be listed in either unit depending on the origin of the documentation.
- Industrial Safety: Pressure values must be correctly interpreted and converted to avoid overloading equipment.
MPa vs PSI: A Side-by-Side Comparison
| Feature | MPa | PSI |
|---|---|---|
| Measurement System | Metric (SI) | Imperial / US Customary |
| 1 unit equals | 1 MPa = 1,000,000 Pa | 1 psi ≈ 6,894.76 Pa |
| 1 MPa in PSI | — | 145.0377 |
| Applications | Hydraulics, mechanics | Tires, compressors, machinery |
FAQ: Megapascal to PSI
How many psi are in 1 MPa?
There are approximately 145.0377 psi in 1 MPa.
How do I convert MPa to psi manually?
Multiply the MPa value by 145.0377 to get the equivalent pressure in psi.
Where is MPa commonly used?
MPa is widely used in engineering, especially in civil, mechanical, and materials engineering, as well as hydraulics.
Is psi still used globally?
Yes, while metric units are preferred internationally, psi remains popular in North America and specific industries like aviation and hydraulics.
Can I use this converter for fluid or gas pressures?
Absolutely. The conversion formula is valid for any type of pressure regardless of the medium.
Use Cases for MPa to PSI Conversion
- Testing lab equipment that reports in MPa but must meet U.S. psi-based safety standards.
- Working with imported machinery from Europe or Asia using metric pressure ratings.
- Building technical documentation for clients in both imperial and metric regions.
- Converting values in technical drawings and blueprints.
Conclusion
In engineering, manufacturing, and pressure system design, unit conversion between MPa and psi is essential. Whether you’re reading a datasheet, configuring a hydraulic pump, or comparing pressure ratings, understanding how to convert from megapascals to pounds per square inch ensures accuracy, safety, and global compatibility. Bookmark this tool for quick access and reliable results every time you need to bridge the gap between metric and imperial pressure units.