MPa to psi Converter

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Convert megapascals to pounds per square inch at the rate 1 MPa ≈ 145.04 psi. Engineering anchors: 10 MPa ≈ 1,450 psi, 50 MPa ≈ 7,252 psi, 100 MPa ≈ 14,504 psi. Useful when metric material yield strengths, hydraulic pressures or pressure-vessel ratings need to be quoted in US psi. Browser-local conversion.

Megapascal (MPa)
Pound per square inch (psi)

Megapascal (MPa) → Pound per square inch (psi)

Quick reference table

Megapascal (MPa)Pound per square inch (psi)
1 MPa145.0377 psi
5 MPa725.1887 psi
10 MPa1450.3774 psi
50 MPa7251.8869 psi
100 MPa14503.7738 psi
200 MPa29007.5475 psi
500 MPa72518.8689 psi

Glossary

Megapascal (MPa)

A megapascal equals 1,000,000 pascals or 10 bar. It is the standard engineering unit for hydraulic systems, high-pressure gas, water-jet cutting, material yield strength and concrete compressive strength. Typical hydraulic systems run at 10–35 MPa; structural concrete reaches 20–80 MPa; high-pressure water jets exceed 400 MPa.

Pound per square inch (psi)

A pound-force per square inch equals 6,894.76 Pa. It is the dominant pressure unit in US automotive and engineering: tire pressure (32 psi = 2.21 bar), hydraulic systems (1,000–3,000 psi), bicycle tires (60–120 psi), municipal water (60 psi typical). Standard atmospheric pressure is 14.696 psi. The unit is sometimes split as psi-g (gauge, above atmospheric) and psi-a (absolute).

Metric / SI pressure

In the metric system, pressure is reported in pascals (SI base) or its multiples — kilopascal (kPa, 10³ Pa), megapascal (MPa, 10⁶ Pa) — and the related non-SI unit bar (10⁵ Pa). The millibar/hectopascal (mbar = hPa = 100 Pa) is used in meteorology. All metric units relate by exact powers of ten, so conversions between them are simple shifts of decimal point.

Imperial / US pressure

US engineering and automotive primarily report pressure in pounds per square inch (psi). 1 psi ≈ 6,894.76 Pa, defined as one pound-force per square inch. Standard atmospheric pressure is 14.696 psi. The closely related "psi-gauge" (psi-g) measures pressure above atmospheric, while "psi-absolute" (psi-a) measures total pressure including atmospheric.

Related tools

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