PSI to MPa Converter
Professional pressure conversion tool for hydraulic systems, material testing, and industrial engineering. Convert between PSI and megapascals with engineering-grade precision.
Result precision:
Enter pressure value in pounds per square inch
Conversion formula: MPa = PSI × 0.00689475729
Quick Engineering Conversions
Engineering Pressure Conversion Tables
PSI to Megapascals
Common values for hydraulic and industrial systems
| PSI | ≈ | MPa |
|---|---|---|
| 1 psi | ≈ | 0.006895 MPa |
| 100 psi | ≈ | 0.6895 MPa |
| 145 psi | ≈ | 1.000 MPa |
| 500 psi | ≈ | 3.447 MPa |
| 1,000 psi | ≈ | 6.895 MPa |
| 3,000 psi | ≈ | 20.684 MPa |
| 5,000 psi | ≈ | 34.474 MPa |
| 10,000 psi | ≈ | 68.948 MPa |
Megapascals to PSI
Common values for material testing and design
| MPa | ≈ | PSI |
|---|---|---|
| 0.1 MPa | ≈ | 14.504 psi |
| 0.5 MPa | ≈ | 72.519 psi |
| 1 MPa | ≈ | 145.038 psi |
| 5 MPa | ≈ | 725.189 psi |
| 10 MPa | ≈ | 1,450.38 psi |
| 20 MPa | ≈ | 2,900.76 psi |
| 50 MPa | ≈ | 7,251.89 psi |
| 100 MPa | ≈ | 14,503.77 psi |
About PSI & MPa Units
Conversion Formulas
PSI to Megapascals
MPa = PSI × 0.00689475729
Example: 1000 psi × 0.00689475729 = 6.89475729 MPa
Megapascals to PSI
PSI = MPa × 145.0377377
Example: 5 MPa × 145.0377377 = 725.1886885 psi
Pressure Unit Definitions
PSI (pounds per square inch)
An imperial unit measuring pressure as one pound-force applied over one square inch. Widely used in the United States for hydraulic systems, pressure vessels, and material strength specifications.
MPa (megapascal)
A metric unit equal to one million pascals (1 MPa = 1,000,000 Pa). A pascal is one newton of force per square meter. Used internationally in engineering for high-pressure systems, material testing, and structural design.
Engineering Applications
Hydraulic Systems
Converting pressure ratings for hydraulic cylinders, pumps, and hoses (typically 3,000-5,000 psi / 20.7-34.5 MPa).
Material Testing
Tensile strength and pressure resistance measurements for metals, plastics, and composites.
Industrial Equipment
Pressure vessel ratings, pipeline specifications, and manufacturing machinery.
Automotive Engineering
Fuel system pressures, hydraulic brake systems, and component stress testing.
Engineering FAQs
The choice between PSI and MPa depends on regional standards and application:
- PSI: Preferred in the United States for most industrial and commercial applications, including hydraulic systems, plumbing, and pressure vessels.
- MPa: Used internationally in engineering, scientific research, and material testing. Common in automotive, aerospace, and high-pressure systems where metric units are standard.
Engineering specifications often include both units for global compatibility, especially in multinational industries.
Precision is critical in engineering applications because:
- Hydraulic system safety margins often depend on precise pressure calculations (a 0.1 MPa error can exceed design limits).
- Material strength ratings require exact conversions to ensure components meet safety standards.
- International manufacturing specifications demand consistency across metric and imperial units.
- Pressure vessel certifications rely on accurate conversions for regulatory compliance.
This converter offers up to 10 decimal places to meet engineering precision requirements.
These units measure the same physical quantity (pressure) but on different scales:
1 kPa = 0.001 MPa = 0.1450377377 PSI
1 PSI = 6.89475729 kPa = 0.00689475729 MPa
MPa is typically used for high pressures (hydraulic systems, material strength), kPa for medium pressures (pneumatics, water systems), and PSI for both in imperial contexts.
Common engineering pressure ranges in MPa:
- Domestic water systems: 0.2-0.6 MPa (29-87 psi)
- Industrial pneumatic systems: 0.6-1.0 MPa (87-145 psi)
- Mobile hydraulic systems: 10-35 MPa (1,450-5,076 psi)
- Hydraulic presses: 35-70 MPa (5,076-10,153 psi)
- High-pressure water jetting: 70-300 MPa (10,153-43,511 psi)
- Steel tensile strength: 250-2,000 MPa (36,259-290,075 psi)
These ranges highlight why both MPa (for high pressures) and PSI (for moderate pressures) remain relevant in different contexts.