36,259.5
PSI
2,500
bar
36,259.5
PSI
2,500
bar
The Megapascals to PSI Converter converts pressure from megapascals (MPa) to pounds per square inch (PSI). The conversion factor is 1 MPa = 145.038 PSI. The megapascal is the standard pressure unit in materials science, structural engineering, and high-pressure industrial applications, representing one million Pascals.
Megapascals are the preferred unit for expressing material mechanical properties. The yield strength of structural steel (ASTM A36) is about 250 MPa (36,259 PSI). Concrete compressive strength ranges from 20–40 MPa (2,901–5,802 PSI) for standard grades. Aluminum alloy tensile strengths range from 70–700 MPa depending on the alloy and temper. These values appear throughout engineering specifications, materials databases, and structural calculations worldwide.
In hydraulic engineering, high-pressure systems commonly operate in the megapascal range. Hydraulic presses may operate at 10–70 MPa (1,450–10,153 PSI), while water jet cutting systems reach 200–600 MPa (29,008–87,023 PSI). Diamond anvil cells used in physics research can achieve pressures exceeding 100,000 MPa (14.5 million PSI), replicating conditions found at Earth's core.
This converter is indispensable for structural engineers, materials scientists, and mechanical engineers who work with specifications originating from different measurement traditions. International standards (ISO, EN) predominantly use MPa, while American standards (ASTM, AISI) may use either MPa or PSI. Our converter provides bar equivalents as well, since 1 MPa = 10 bar exactly.
The formula: PSI = MPa × 145.038. Since 1 MPa = 1,000,000 Pa and 1 PSI ≈ 6,894.757 Pa: 1 MPa = 1,000,000 / 6,894.757 ≈ 145.038 PSI.
For bars: bar = MPa × 10 (exact, since 1 MPa = 1,000,000 Pa = 10 × 100,000 Pa = 10 bar).
Common values: 1 MPa = 145 PSI = 10 bar, 250 MPa = 36,260 PSI (steel yield strength), 35 MPa = 5,076 PSI (concrete), 690 MPa = 100,076 PSI (high-strength bolt rating). Earth's core pressure is estimated at about 360,000 MPa.
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ASTM A36 steel yield: 250 MPa
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Results
Standard concrete: 35 MPa
1 MPa = 145.038 PSI. This is also exactly 10 bar.
PSI = MPa × 145.038. For example, 200 MPa = 29,008 PSI.
250 MPa = 36,260 PSI. This is approximately the yield strength of mild structural steel (ASTM A36).
Multiply by 10. Since 1 MPa = 1,000,000 Pa and 1 bar = 100,000 Pa, the conversion is exact: 1 MPa = 10 bar.
Normal concrete ranges from 20–40 MPa. High-performance concrete can reach 100 MPa or more. Ultra-high-performance concrete (UHPC) exceeds 150 MPa.
Tensile strength is the maximum stress a material can withstand before breaking. Common values: mild steel 400–550 MPa, aluminum 6061-T6: 310 MPa, titanium Ti-6Al-4V: 900 MPa.
1 GPa = 1,000 MPa = 145,038 PSI. Gigapascals are used for very stiff materials like diamond (Young's modulus ≈ 1,050 GPa).
Each 100 meters of water depth adds about 0.981 MPa (142 PSI). The deepest ocean (11 km) has about 110 MPa pressure.
The Pascal is too small for most engineering applications. A concrete column supporting 35 MPa is much more readable than 35,000,000 Pa.
Proof pressure is the test pressure a vessel must withstand without permanent deformation, typically 1.5× the working pressure. It verifies the integrity of pressure equipment.
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