Convert Megapascals to psi
1 megapascal (MPa) equals 145.0377377 psi.
1 MPa = 145.0377377 psi
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk megapascal to psi converter to paste a column from Excel.
How to Convert Megapascal to psi
- 1 MPa = 145.0377377 psi
- 1 psi = 0.006894757293 MPa
- Example: convert 15 MPa to psi: 15 MPa = 15 × 145.0377377 psi = 2175.566066 psi
Formula
psi = MPa × 145.0377377302
Derivation from SI units:
- 1 MPa = 10⁶ Pa = 1 N/mm²
- 1 psi = 1 lbf/in² = (0.45359237 kg × 9.80665 m/s²) ÷ (0.0254 m)² = 6894.757293168 Pa
- 1 MPa = 1000000 Pa ÷ 6894.757293168 Pa per psi = 145.0377377302 psi
Both units are defined exactly, so the factor is exact. Megapascal definition: megapascal; psi definition: psi.
Worked examples
- Concrete with 30 MPa compressive strength is about 4351.132132 psi.
30 MPa × 145.0377377 = 4351.132132 psi - S355 steel, with a yield strength of 355 MPa, yields at about 51488.39689 psi.
355 MPa × 145.0377377 = 51488.39689 psi
Megapascal to psi conversion table
| Megapascals (MPa) | psi |
|---|---|
| 0.01 MPa | 1.450377377 psi |
| 0.05 MPa | 7.251886887 psi |
| 0.1 MPa | 14.50377377 psi |
| 0.2 MPa | 29.00754755 psi |
| 0.5 MPa | 72.51886887 psi |
| 0.7 MPa | 101.5264164 psi |
| 1 MPa | 145.0377377 psi |
| 1.5 MPa | 217.5566066 psi |
| 2 MPa | 290.0754755 psi |
| 2.5 MPa | 362.5943443 psi |
| 5 MPa | 725.1886887 psi |
| 7 MPa | 1015.264164 psi |
| 10 MPa | 1450.377377 psi |
| 15 MPa | 2175.566066 psi |
| 20 MPa | 2900.754755 psi |
| 25 MPa | 3625.943443 psi |
| 30 MPa | 4351.132132 psi |
| 40 MPa | 5801.509509 psi |
| 50 MPa | 7251.886887 psi |
| 70 MPa | 10152.64164 psi |
| 100 MPa | 14503.77377 psi |
| 200 MPa | 29007.54755 psi |
| 250 MPa | 36259.43443 psi |
| 355 MPa | 51488.39689 psi |
| 500 MPa | 72518.86887 psi |
Where it's used
Engineers convert MPa to psi or ksi when reading ISO and Eurocode data against ACI, AISC or ASTM requirements.
Megapascal to other pressure units
| Conversion | 1 MPa equals |
|---|---|
| megapascal to pascal | 1000000 Pa |
| megapascal to kilopascal | 1000 kPa |
| megapascal to psi | 145.0377377 psi |
| megapascal to bar | 10 bar |
| megapascal to millibar | 10000 mbar |
| megapascal to decibar | 100 dbar |
| megapascal to torr | 7500.616827 Torr |
| megapascal to millimeter of mercury | 7500.615758 mmHg |
| megapascal to millimeter of water | 101971.6213 mmH₂O |
| megapascal to centimeter of water | 10197.16213 cmH₂O |
| megapascal to inch of water | 4014.63076 inH₂O |
| megapascal to inch of water (60 °F) | 4018.64652 inH₂O (60 °F) |
| megapascal to inch of mercury | 295.299833 inHg |
| megapascal to atmosphere | 9.869232667 atm |
| megapascal to barye | 10000000 Ba |
Frequently asked questions
How many psi is 1 MPa?
1 MPa = 145.0377377 psi, roughly 145 psi.
How many psi are in 1 megapascal?
1 MPa = 145.0377377 psi.
How do I convert megapascals to psi?
Multiply the value in MPa by 145.0377377. For example, 15 MPa × 145.0377377 = 2175.566066 psi.
Is the MPa to psi conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "pound-force per square inch (psi)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Megapascals to psi. Retrieved October 17, 2026, from https://scientificconverters.com/pressure/megapascal-to-psi/
IEEE
Scientific Converters, "Convert Megapascals to psi," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/pressure/megapascal-to-psi/