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Accurate pressure conversion tool for megapascals and pounds per square inch
Convert MPa to PSI instantly with precise calculations. Includes bidirectional conversion, formula breakdown, and reference tables for 2026.
Professional pressure conversion for engineering, construction, and industrial use
Convert megapascals to PSI using the exact conversion factor of 145.038 PSI per MPa. Our tool delivers precise results suitable for engineering calculations, tyre pressure, hydraulic systems, and material strength ratings.
Switch seamlessly between MPa to PSI and PSI to MPa modes. Get instant results along with equivalent values in other common pressure units including kPa, bar, and atmospheres — all from a single input.
Essential for engineers, mechanics, construction professionals, and students working with structural loads, hydraulic pressure, tyre specifications, boiler ratings, and material tensile strength in 2026.
Select conversion direction and enter your value below
Pressure is one of the most critical measurements in engineering, manufacturing, and industry. Megapascal (MPa) is the SI unit of pressure equal to one million pascals, widely used in structural engineering, materials science, and hydraulic systems. PSI (Pounds per Square Inch) is the imperial unit still commonly used in the United States, UK, and many industrial sectors for tyre pressure, pipeline ratings, and equipment specifications.
The exact conversion factor between MPa and PSI is 1 MPa = 145.038 PSI. This is derived from the definition of one pascal (1 Pa = 1 N/m²) and the imperial pound-force per square inch unit. For reverse conversion, 1 PSI = 0.00689476 MPa. Understanding this relationship is fundamental for engineers working across metric and imperial systems — you can read more about pressure units from the NIST Guide to SI Units.
1 MPa equals 145.038 PSI, 1,000 kPa, and 10 Bar — all representing the same pressure in different unit systems.
The table below provides quick MPa to PSI reference values for the most commonly used pressure ranges in engineering, construction, and industrial applications in 2026. For related area conversions used in pressure calculations, see our Acres to Square Metres Converter.
| MPa | PSI | kPa | Bar | Atmosphere (atm) |
|---|---|---|---|---|
| 0.1 MPa | 14.50 PSI | 100 kPa | 1 Bar | 0.987 atm |
| 0.5 MPa | 72.52 PSI | 500 kPa | 5 Bar | 4.935 atm |
| 1 MPa | 145.04 PSI | 1,000 kPa | 10 Bar | 9.869 atm |
| 2 MPa | 290.08 PSI | 2,000 kPa | 20 Bar | 19.738 atm |
| 5 MPa | 725.19 PSI | 5,000 kPa | 50 Bar | 49.346 atm |
| 10 MPa | 1,450.38 PSI | 10,000 kPa | 100 Bar | 98.692 atm |
| 20 MPa | 2,900.76 PSI | 20,000 kPa | 200 Bar | 197.385 atm |
| 50 MPa | 7,251.89 PSI | 50,000 kPa | 500 Bar | 493.462 atm |
| 100 MPa | 14,503.77 PSI | 100,000 kPa | 1,000 Bar | 986.923 atm |
| 200 MPa | 29,007.55 PSI | 200,000 kPa | 2,000 Bar | 1,973.85 atm |
Use this quick reference table to convert common PSI values back to MPa. This is especially useful for mechanics, tyre specialists, and hydraulic engineers working with imperial-rated equipment.
| PSI | MPa | kPa | Bar |
|---|---|---|---|
| 14.5 PSI | 0.100 MPa | 100 kPa | 1.00 Bar |
| 30 PSI | 0.207 MPa | 206.8 kPa | 2.07 Bar |
| 60 PSI | 0.414 MPa | 413.7 kPa | 4.14 Bar |
| 100 PSI | 0.689 MPa | 689.5 kPa | 6.89 Bar |
| 145 PSI | 1.000 MPa | 1,000 kPa | 10.00 Bar |
| 300 PSI | 2.068 MPa | 2,068 kPa | 20.68 Bar |
| 500 PSI | 3.447 MPa | 3,447 kPa | 34.47 Bar |
| 1000 PSI | 6.895 MPa | 6,895 kPa | 68.95 Bar |
| 3000 PSI | 20.684 MPa | 20,684 kPa | 206.84 Bar |
| 5000 PSI | 34.474 MPa | 34,474 kPa | 344.74 Bar |
MPa and PSI appear across many industries. Understanding what these numbers mean in context helps engineers and technicians work safely and accurately. Below are the most common real-world pressure ranges used in 2026.
Standard car tyre pressure is typically 0.19–0.24 MPa (28–35 PSI). Truck tyres operate at higher pressures, often 0.55–0.83 MPa (80–120 PSI). Correct tyre pressure is critical for fuel efficiency, safety, and tyre longevity.
Normal structural concrete has a compressive strength of 20–40 MPa (2,900–5,800 PSI). High-performance concrete can reach 100 MPa (14,500 PSI) or more. These values are essential for civil engineering and construction design.
Industrial hydraulic systems typically operate at 10–35 MPa (1,450–5,076 PSI). Heavy-duty hydraulic presses can exceed 70 MPa (10,000 PSI). Understanding these ranges is vital for selecting hoses, fittings, and seals correctly.
Water supply pipelines operate at 0.3–0.7 MPa (43–101 PSI). Natural gas transmission pipelines typically run at 3.5–10 MPa (508–1,450 PSI). These specifications are tightly regulated for public safety and infrastructure integrity.
Aircraft cabin pressure is maintained at approximately 0.075 MPa (10.9 PSI). Hydraulic flight control systems operate at 20–35 MPa (2,900–5,076 PSI). Aerospace applications demand the highest precision in pressure measurement and conversion.
Steel tensile strength ranges from 400–2,500 MPa (58,000–362,500 PSI) depending on grade. Structural steel for construction typically has a yield strength of 250–690 MPa (36,000–100,000 PSI), guiding safe structural design decisions.
Use MPa when working in metric engineering environments, structural analysis, material specifications, or scientific contexts. Use PSI when dealing with US/UK-manufactured equipment, tyre pressure gauges, hydraulic tools rated in imperial units, or reading older equipment manuals. Our converter handles both directions instantly.
Converting MPa to PSI is a straightforward single-step multiplication. Here is the process broken down clearly so you can perform it manually if needed.
Do not confuse MPa with kPa — 1 MPa equals 1,000 kPa, so mixing them causes a 1,000× error in your result. Also note that gauge pressure (PSIg/MPag) and absolute pressure (PSIa/MPaa) differ by atmospheric pressure (0.101325 MPa / 14.696 PSI). Always confirm which reference is required for your application.
The pascal (Pa) is the SI unit of pressure defined as one newton per square metre. The megapascal (MPa) equals one million pascals and is the standard unit for material strength, hydraulic systems, and structural engineering globally.
Learn More →PSI remains the dominant pressure unit in US and UK manufacturing, automotive, and oil & gas sectors. Understanding its relationship to MPa is essential for engineers and technicians working with both metric and imperial-rated equipment and documentation.
Explore More →From concrete compressive strength to hydraulic circuit design, pressure is fundamental in nearly every engineering discipline. Using accurate MPa to PSI conversions ensures structural safety, equipment compliance, and cross-border project compatibility in 2026.
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