Convert pressure units — pascal, PSI, bar, atmosphere, torr, mmHg and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 psi | 6.89476e-06 MPa | |
| 0.01 psi | 6.89476e-05 MPa | |
| 0.1 psi | 0.000689476 MPa | |
| 1 psi | 0.00689476 MPa | |
| 5 psi | 0.0344738 MPa | |
| 10 psi | 0.0689476 MPa | |
| 50 psi | 0.344738 MPa | |
| 100 psi | 0.689476 MPa | |
| 1000 psi | 6.89476 MPa |
Formula: Megapascal = PSI × 0.006895
Multiply any psi value by 0.006895 to get megapascal.
Reverse: PSI = Megapascal × 145
Common psi values — factor: 1 psi = 0.006895 MPa
| PSI (psi) | Megapascal (MPa) | Context |
|---|---|---|
| 0.1 psi | 0.0006895 MPa | Very low gauge |
| 1 psi | 0.006895 MPa | Low tire |
| 5 psi | 0.03447 MPa | Bike inner tube low |
| 10 psi | 0.06895 MPa | Low hydraulic |
| 14.7 psi | 0.1013 MPa | 1 atm |
| 20 psi | 0.1379 MPa | Soft tire |
| 30 psi | 0.2068 MPa | Car tire low |
| 35 psi | 0.2413 MPa | Car tire normal |
| 60 psi | 0.4137 MPa | Truck tire |
| 100 psi | 0.6895 MPa | Medium hydraulic |
| 150 psi | 1.034 MPa | High hydraulic |
| 1,000 psi | 6.895 MPa | Industrial |
| 3,000 psi | 20.68 MPa | Scuba cylinder |
| 6,000 psi | 41.37 MPa | High-pressure cylinder |
| 1.5e+04 psi | 103.4 MPa | Waterjet |
1 psi = 0.006895 MPa. Memorize for instant estimates.
Use 0.0069 as a quick mental multiplier.
Multiply result by 145 to recover the original psi value.
Inflates and checks car, truck, and bicycle tires to specified psi pressures.
Specifies refrigerant pressures and system test pressures in psi for US equipment.
Designs hydraulic systems rated in psi for American industrial machinery.
Monitors tank pressure (3,000 psi fill) and reserve pressure on US-spec gauges.
Specifies pipe pressure ratings and test pressures in psi for US plumbing codes.
Checks oil pressure (35–65 psi), coolant pressure, and brake line pressure in psi.
PSI (pounds per square inch) is the primary pressure unit in the United States, UK, and other countries using Imperial measures. It equals the force of one pound-force applied over one square inch of area (6,894.76 Pa).
PSI is used for tire pressure (car: 30–35 psi, truck: 80–120 psi), blood pressure measurement in the US, boiler pressure ratings, and hydraulic system specifications in American engineering.
Interesting fact: The deepest ocean dive by a human (Victor Vescovo, 2019, 10,928 m) would have experienced about 15,900 psi of external pressure on the submersible hull.
The megapascal (MPa) equals 1,000,000 pascals (1,000 kPa) and is the standard unit for high-pressure engineering applications including hydraulics, structural materials, and industrial processes.
Steel has a tensile strength of about 400–550 MPa; concrete compressive strength is typically 20–40 MPa. Hydraulic systems in heavy machinery operate at 20–35 MPa. Water jet cutting uses pressures up to 600 MPa.
Interesting fact: The deepest point in the ocean (Mariana Trench, ~11,000 m) has a pressure of about 110 MPa — over 1,000 times atmospheric pressure.
Converting psi to megapascal is a common task in engineering, medicine, meteorology, and science. Different industries and countries use different pressure units — PSI in the US, bar in Europe, mmHg in medicine, and pascals in physics — making accurate conversion essential for cross-disciplinary work.
Quick reference: 5 psi = 0.03447 MPa and 10 psi = 0.06895 MPa. For the reverse: 1 MPa = 145 psi. The exact factor is 1 psi = 0.006895 MPa.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.