Convert psi to Megapascals
1 psi equals 0.006894757293 megapascals (MPa).
1 psi = 0.006894757293 MPa
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk psi to megapascal converter to paste a column from Excel.
How to Convert psi to Megapascal
- 1 psi = 0.006894757293 MPa
- 1 MPa = 145.0377377 psi
- Example: convert 15 psi to MPa: 15 psi = 15 × 0.006894757293 MPa = 0.1034213594 MPa
Formula
MPa = psi × 0.006894757293168
or MPa = psi ÷ 145.0377377302
Derivation from SI units:
- 1 psi = 1 lbf/in² = (0.45359237 kg × 9.80665 m/s²) ÷ (0.0254 m)² = 6894.757293168 Pa
- 1 MPa = 10⁶ Pa = 1 N/mm²
- 1 psi = 6894.757293168 Pa ÷ 1000000 Pa per MPa = 0.006894757293168 MPa
Both units are defined exactly, so the factor is exact. psi definition: psi; Megapascal definition: megapascal.
Worked examples
- A 3000 psi hydraulic system is rated 20.68427188 MPa.
3000 psi × 0.006894757293 = 20.68427188 MPa - Concrete with a compressive strength of 5000 psi is about 34.47378647 MPa.
5000 psi × 0.006894757293 = 34.47378647 MPa
psi to Megapascal conversion table
| psi | Megapascals (MPa) |
|---|---|
| 0.01 psi | 0.00006894757293 MPa |
| 0.05 psi | 0.0003447378647 MPa |
| 0.1 psi | 0.0006894757293 MPa |
| 0.25 psi | 0.001723689323 MPa |
| 0.5 psi | 0.003447378647 MPa |
| 1 psi | 0.006894757293 MPa |
| 2 psi | 0.01378951459 MPa |
| 5 psi | 0.03447378647 MPa |
| 10 psi | 0.06894757293 MPa |
| 14.7 psi | 0.1013529322 MPa |
| 15 psi | 0.1034213594 MPa |
| 20 psi | 0.1378951459 MPa |
| 25 psi | 0.1723689323 MPa |
| 30 psi | 0.2068427188 MPa |
| 32 psi | 0.2206322334 MPa |
| 35 psi | 0.2413165053 MPa |
| 40 psi | 0.2757902917 MPa |
| 50 psi | 0.3447378647 MPa |
| 60 psi | 0.4136854376 MPa |
| 80 psi | 0.5515805835 MPa |
| 100 psi | 0.6894757293 MPa |
| 125 psi | 0.8618446616 MPa |
| 150 psi | 1.034213594 MPa |
| 200 psi | 1.378951459 MPa |
| 500 psi | 3.447378647 MPa |
| 1000 psi | 6.894757293 MPa |
| 3000 psi | 20.68427188 MPa |
| 5000 psi | 34.47378647 MPa |
Where it's used
Material strengths and hydraulic ratings in US units (psi, ksi) are converted to MPa for international standards such as Eurocode and ISO.
psi to other pressure units
| Conversion | 1 psi equals |
|---|---|
| psi to pascal | 6894.757293 Pa |
| psi to kilopascal | 6.894757293 kPa |
| psi to megapascal | 0.006894757293 MPa |
| psi to bar | 0.06894757293 bar |
| psi to millibar | 68.94757293 mbar |
| psi to decibar | 0.6894757293 dbar |
| psi to torr | 51.71493257 Torr |
| psi to millimeter of mercury | 51.7149252 mmHg |
| psi to millimeter of water | 703.0695796 mmH₂O |
| psi to centimeter of water | 70.30695796 cmH₂O |
| psi to inch of water | 27.67990471 inH₂O |
| psi to inch of water (60 °F) | 27.7075924 inH₂O (60 °F) |
| psi to inch of mercury | 2.036020677 inHg |
| psi to atmosphere | 0.06804596391 atm |
| psi to barye | 68947.57293 Ba |
Frequently asked questions
How many MPa is 1 ksi?
1 ksi = 1000 psi = 6.894757293 MPa.
How many megapascals are in 1 psi?
1 psi = 0.006894757293 MPa.
How do I convert psi to megapascals?
Multiply the value in psi by 0.006894757293, or divide it by 145.0377377. For example, 15 psi × 0.006894757293 = 0.1034213594 MPa.
Is the psi to MPa 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
- 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)".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
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 psi to Megapascals. Retrieved October 17, 2026, from https://scientificconverters.com/pressure/psi-to-megapascal/
IEEE
Scientific Converters, "Convert psi to Megapascals," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/pressure/psi-to-megapascal/