MPa to PSI Conversion
Convert megapascals (MPa) to pounds per square inch (psi) instantly with this free online pressure converter. 1 MPa = 145.0377 psi. Ideal for engineering, materials science, hydraulics, and industrial applications.
About This Calculator
MPa to PSI Conversion is a free online tool that converts pressure values from megapascals (MPa) to pounds per square inch (PSI). It is designed for engineers, materials scientists, mechanics, and anyone who needs quick, accurate pressure unit conversions for industrial, automotive, or academic applications.
The conversion uses the standard formula: Pressure in PSI = Pressure in MPa × 145.0377. The factor 145.0377 comes from the relationship 1 MPa = 1,000,000 pascals (Pa) and 1 PSI = 6,894.76 Pa. Dividing 1,000,000 by 6,894.76 gives the conversion factor of approximately 145.0377.
To convert PSI back to MPa, the formula is: Pressure in MPa = Pressure in PSI ÷ 145.0377.
Common Applications
- Materials science and testing: Material strength properties like tensile strength, yield strength, and Young's modulus are often measured in MPa. Engineers frequently convert these values to PSI for US-based specifications and reports.
- Hydraulic systems: Industrial hydraulic systems operate at pressures ranging from 5 to 35 MPa (725–5,076 PSI). Component specifications may be listed in either unit depending on the manufacturer's region.
- Construction and concrete: Concrete compressive strength is typically specified in MPa (e.g., 20 MPa, 30 MPa). Converting to PSI helps with international projects and US building codes.
- High-pressure equipment: Pressure vessels, autoclaves, and compressed gas cylinders are rated in MPa in most countries but PSI in the United States, making regular conversions essential.
Regional Notes
- India (IN): MPa is the standard unit for pressure in engineering and construction following the SI system. IS codes for concrete and steel use MPa for strength specifications.
- United States (US): PSI is the predominant unit for pressure in construction, automotive, and industrial applications. MPa is used primarily in scientific research and international standards.
- United Kingdom (UK): Both MPa and PSI are used. Engineering standards and building regulations increasingly adopt SI units (MPa), while traditional industries and tire pressure still use PSI.
Frequently Asked Questions
How do you convert MPa to PSI?
To convert MPa to PSI, multiply the pressure value in megapascals by 145.0377. For example, 1 MPa × 145.0377 = 145.0377 PSI. Our calculator does this instantly for you.
What is the conversion factor from MPa to PSI?
The conversion factor from megapascals to PSI is 145.0377. One MPa equals 145.0377 pounds per square inch (PSI). This factor is derived from 1 MPa = 1,000,000 Pa and 1 PSI = 6,894.76 Pa.
What is 10 MPa in PSI?
10 MPa is equal to 1,450.38 PSI. Multiply 10 by 145.0377 to get this result. This pressure is common in high-pressure hydraulic systems and industrial machinery.
What is the difference between MPa and PSI?
MPa (megapascal) is the SI metric unit for pressure, equal to one million pascals. PSI (pounds per square inch) is the imperial/US customary unit. MPa is commonly used in engineering, materials science, and construction worldwide, while PSI is prevalent in the United States and for tire pressure measurements.
How do you convert PSI back to MPa?
To convert PSI back to MPa, divide the pressure value in PSI by 145.0377. For example, 1,000 PSI ÷ 145.0377 = 6.89 MPa. Our tool's reverse calculation uses this formula.
Is this MPa to PSI converter free to use?
Yes, this MPa to PSI conversion calculator is completely free to use with no limits, registration, or hidden fees. Bookmark it for quick pressure conversions anytime.