MPa to PSI
Convert MPa to PSI
"MPa to PSI" Calculator
How to convert megapascals to pounds per square inch
Worked example: 1 MPa ≈ 145.04 psi
1 MPa × 645.16 ÷ 4.4482216152605 ≈ 145.04 psi
645.16 = 1,000,000 Pa in a megapascal × 0.00064516 m² in a square inch; 4.4482216152605 N in a pound-force
Rule: pounds per square inch = megapascals × 645.16 ÷ 4.4482216152605 ≈ megapascals × 145.038 — 1 psi = 1 lbf/in².
| Megapascals | Pounds per square inch |
|---|---|
| 0.2 MPa | 29.01 psi |
| 0.5 MPa | 72.52 psi |
| 0.7 MPa | 101.53 psi |
| 1 MPa | 145.04 psi |
| 1.6 MPa | 232.06 psi |
| 2 MPa | 290.08 psi |
| 3 MPa | 435.11 psi |
| 4 MPa | 580.15 psi |
| 5 MPa | 725.19 psi |
| 6 MPa | 870.23 psi |
| 7 MPa | 1,015.26 psi |
| 8 MPa | 1,160.3 psi |
| 10 MPa | 1,450.38 psi |
| 20 MPa | 2,900.75 psi |
| 25 MPa | 3,625.94 psi |
| 30 MPa | 4,351.13 psi |
| 35 MPa | 5,076.32 psi |
| 40 MPa | 5,801.51 psi |
| 50 MPa | 7,251.89 psi |
| 70 MPa | 10,152.64 psi |
See Also
- Bar to PSI - Convert Bar to PSI
- PSI to Bar - Convert PSI to Bar
- kPa to PSI - Convert kPa to PSI
- MPa to kgf/cm² - Convert MPa to kgf/cm²
- PSI to kPa - Convert PSI to kPa
- Bar to atm - Convert Bar to atm
- atm to Bar - Convert atm to Bar
- Newton-Meters to Foot-Pounds - Convert Newton-Meters to Foot-Pounds
- Foot-Pounds to Newton-Meters - Convert Foot-Pounds to Newton-Meters
- Newton-Meters to Inch-Pounds - Convert Newton-Meters to Inch-Pounds
- Inch-Pounds to Newton-Meters - Convert Inch-Pounds to Newton-Meters
FAQ
How many psi is 1 MPa?
1 MPa ≈ 145.038 psi. Exactly, psi = MPa × 645.16 ÷ 4.4482216152605. The factor never ends as a decimal, so almost every answer in psi is rounded and shown after ≈; an answer that comes out exact is shown with =.
Where do 645.16 and 4.4482216152605 come from?
A psi is one pound-force (4.4482216152605 N exactly) on one square inch (0.00064516 m² exactly), and a megapascal is exactly 1,000,000 Pa. 645.16 is 1,000,000 Pa in a megapascal times 0.00064516 m², so psi = MPa × 645.16 ÷ 4.4482216152605.
How do MPa relate to bar?
1 MPa = 10 bar exactly (1 bar = 100,000 Pa), so 0.6 MPa = 6 bar. Every answer on this page also shows bar, kgf/cm² and atm.
Gauge or absolute pressure: does it matter?
No, as long as both sides are of the same kind. Gauge pressure (psig) counts from the surrounding air, absolute pressure (psia) from vacuum, and the factor is the same for both. Data sheets usually give gauge pressure.