Psi to Megapascals Converter
How to convert psi to megapascals
megapascals = psi ÷ 145.037738
To convert psi to megapascals, divide the number of psi by 145.037738.
1 psi = 0.00689475729 MPa
Examples
- A typical car tire pressure: 32 psi ÷ 145.037738 = 0.220632233 MPa
- 100 psi ÷ 145.037738 = 0.689475729 MPa
Good to know
One megapascal is about 145 psi. Material strengths and hydraulic pressures are given in MPa in SI specifications and in psi in US ones.
Psi means pounds-force per square inch (lbf/in²). Gauge readings (psig) are measured relative to atmospheric pressure, absolute readings (psia) relative to a vacuum; the conversion factor is the same for both.
Psi to megapascals conversion table
| Psi | Megapascals (MPa) |
|---|---|
| 1 psi | 0.00689475729 MPa |
| 5 psi | 0.0344737865 MPa |
| 10 psi | 0.0689475729 MPa |
| 14.7 psi | 0.101352932 MPa |
| 15 psi | 0.103421359 MPa |
| 20 psi | 0.137895146 MPa |
| 25 psi | 0.172368932 MPa |
| 30 psi | 0.206842719 MPa |
| 32 psi | 0.220632233 MPa |
| 35 psi | 0.241316505 MPa |
| 40 psi | 0.275790292 MPa |
| 45 psi | 0.310264078 MPa |
| 50 psi | 0.344737865 MPa |
| 60 psi | 0.413685438 MPa |
| 80 psi | 0.551580583 MPa |
| 100 psi | 0.689475729 MPa |
Unit definitions
- Psi
- Psi is one pound-force per square inch, about 6894.757 pascals. It is the everyday pressure unit in the United States, used for tires, compressors and plumbing.
- Megapascal (MPa)
- A megapascal is 1,000,000 pascals, or 10 bar. It is used for hydraulic pressures and for the strength of materials such as steel and concrete.