Convert Megapascals to Pounds per Square Inch
Instantly convert Megapascals (MPa) to Pounds per Square Inch (psi) with our free online calculator.
Formula: MPa to psi — multiply by 145.038
Reference Table
| Megapascals (MPa) | Pounds per Square Inch (psi) |
|---|---|
| 1 | 145.038 |
| 5 | 725.189 |
| 10 | 1450.38 |
| 25 | 3625.94 |
| 50 | 7251.89 |
| 100 | 14503.8 |
How to Convert Megapascals to Pounds per Square Inch
Formula
To convert Megapascals (MPa) to Pounds per Square Inch (psi): multiply by 145.038
Step-by-Step
- Start with your value in Megapascals (MPa).
- Multiply by 145.038 to perform the conversion.
- The result is your value expressed in Pounds per Square Inch (psi).
Conversion Factor
1 MPa = 145.038 psi
Reverse Factor
1 psi = 0.00689476 MPa
Worked Example
Convert 25 Megapascals to Pounds per Square Inch: 25 MPa = 3625.94 psi
About Megapascal (MPa)
A metric unit of pressure equal to exactly 1,000,000 pascals (1,000 kPa), or 10 bar. Megapascals are the universal SI unit for material strength reporting in structural and mechanical engineering: concrete compressive strength (typically 20-60 MPa per ACI 318 / Eurocode 2, with ultra-high-performance concrete reaching 150-200 MPa), structural-steel yield stress (250 MPa for S275 / A36, 355 MPa for S355, up to 690 MPa for HSLA grades), aluminum tensile (6061-T6 ~310 MPa), and the fracture toughness of ceramics and polymers reported as MPa·m^½ in materials databases. Mechanical-engineering finite-element solvers (Abaqus, ANSYS, Nastran), pressure-vessel codes (ASME BPVC Section VIII, PD 5500, EN 13445), hydraulic system specifications above ~70 bar, and the civil-engineering concrete mix specs all use MPa as the working pressure/stress unit. Common conversions: 1 MPa = 10 bar = 145.04 psi = 9.869 atm.
About Pound per Square Inch (psi)
An imperial unit of pressure equal to one pound-force applied over one square inch (exactly 6,894.757 Pa per NIST SP 811). PSI is the dominant US pressure unit and remains the working unit in most US-built industrial, automotive, and consumer equipment: passenger-car tire inflation (32-35 psi cold), compressed air shop systems (typically 100-150 psi), hydraulic equipment (1,500-3,000 psi mobile, up to 10,000 psi on press brakes), ammunition chamber pressures (SAAMI specs in psi), municipal potable water supply (~40-80 psi at the meter), and natural gas distribution pressures. US engineering textbooks and the ASME B31 pipe codes, API piping specifications, and AWWA waterworks standards quote allowable pressures in psi. Engineers should distinguish gauge psi (psig — pressure above atmospheric) from absolute psi (psia — pressure above perfect vacuum); 0 psig = 14.696 psia at sea level. 1 psi = 6.895 kPa = 0.0689 bar = 51.715 mmHg.
Quick Facts
- 1 Megapascal equals 145.038 Pounds per Square Inch
- 1 Pound per Square Inch equals 0.00689476 Megapascals
- Megapascal is a unit of pressure
- Pound per Square Inch is a unit of pressure
- This conversion is commonly used in tire inflation, weather reporting, scuba diving, and engineering
- The Megapascal belongs to the metric system
- The Pound per Square Inch belongs to the imperial system
Common Megapascal to Pound per Square Inch Conversions
| Megapascals (MPa) | Pounds per Square Inch (psi) |
|---|---|
| 0.1 | 14.5038 |
| 0.5 | 72.5189 |
| 1 | 145.038 |
| 2 | 290.075 |
| 5 | 725.189 |
| 10 | 1450.38 |
| 14.696 | 2131.47 |
| 15 | 2175.57 |
| 20 | 2900.75 |
| 25 | 3625.94 |
| 50 | 7251.89 |
| 100 | 14503.8 |
| 150 | 21755.7 |
| 200 | 29007.5 |
| 500 | 72518.9 |
| 1000 | 145038 |
Understanding Megapascals
The Megapascal (symbol: MPa) is a unit of pressure. A metric unit of pressure equal to exactly 1,000,000 pascals (1,000 kPa), or 10 bar. Megapascals are the universal SI unit for material strength reporting in structural and mechanical engineering: concrete compressive strength (typically 20-60 MPa per ACI 318 / Eurocode 2, with ultra-high-performance concrete reaching 150-200 MPa), structural-steel yield stress (250 MPa for S275 / A36, 355 MPa for S355, up to 690 MPa for HSLA grades), aluminum tensile (6061-T6 ~310 MPa), and the fracture toughness of ceramics and polymers reported as MPa·m^½ in materials databases. Mechanical-engineering finite-element solvers (Abaqus, ANSYS, Nastran), pressure-vessel codes (ASME BPVC Section VIII, PD 5500, EN 13445), hydraulic system specifications above ~70 bar, and the civil-engineering concrete mix specs all use MPa as the working pressure/stress unit. Common conversions: 1 MPa = 10 bar = 145.04 psi = 9.869 atm.
It belongs to the metric measurement system.
Megapascals are commonly used in tire inflation, weather reporting, scuba diving, and engineering.
Understanding Pounds per Square Inch
The Pound per Square Inch (symbol: psi) is a unit of pressure. An imperial unit of pressure equal to one pound-force applied over one square inch (exactly 6,894.757 Pa per NIST SP 811). PSI is the dominant US pressure unit and remains the working unit in most US-built industrial, automotive, and consumer equipment: passenger-car tire inflation (32-35 psi cold), compressed air shop systems (typically 100-150 psi), hydraulic equipment (1,500-3,000 psi mobile, up to 10,000 psi on press brakes), ammunition chamber pressures (SAAMI specs in psi), municipal potable water supply (~40-80 psi at the meter), and natural gas distribution pressures. US engineering textbooks and the ASME B31 pipe codes, API piping specifications, and AWWA waterworks standards quote allowable pressures in psi. Engineers should distinguish gauge psi (psig — pressure above atmospheric) from absolute psi (psia — pressure above perfect vacuum); 0 psig = 14.696 psia at sea level. 1 psi = 6.895 kPa = 0.0689 bar = 51.715 mmHg.
It belongs to the imperial measurement system.
Pounds per Square Inch are commonly used in tire inflation, weather reporting, scuba diving, and engineering.
Why Convert Megapascals to Pounds per Square Inch?
Engineers, mechanics, and scientists frequently need to convert pressure between Megapascals and Pounds per Square Inch when working with different measurement standards. Tire pressure, blood pressure readings, weather barometric measurements, and industrial process specifications may all use different pressure units depending on the region or discipline. Reliable conversion prevents equipment misuse and ensures safety.
Frequently Asked Questions
How do I convert Megapascals to Pounds per Square Inch?
A metric unit of pressure equal to exactly 1,000,000 pascals (1,000 kPa), or 10 bar. To convert Megapascals to Pounds per Square Inch, multiply by 145.038. For example, 25 MPa equals 3625.94 psi.
How many Pounds per Square Inch are in 1 Megapascal?
There are 145.038 Pounds per Square Inch in 1 Megapascal.
How many Megapascals are in 1 Pound per Square Inch?
There are 0.00689476 Megapascals in 1 Pound per Square Inch.
What is the formula for Megapascal to Pound per Square Inch conversion?
The formula is: multiply by 145.038. This means 1 MPa = 145.038 psi.
Is a Megapascal bigger than a Pound per Square Inch?
No. One Megapascal is smaller than one Pound per Square Inch because 1 MPa equals 145.038 psi, which is greater than 1.
When do you need to convert between Megapascals and Pounds per Square Inch?
An imperial unit of pressure equal to one pound-force applied over one square inch (exactly 6,894. Megapascal and Pound per Square Inch are both pressure units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.