Pounds per square inch to Megapascals
1 pound per square inch = 0.0068948 megapascals · 1 MPa = 145.04 psi
1 pound per square inch = 0.0068948 megapascals
How it’s calculated
MPa = psi ÷ 145.0377377
- Divide the value in pounds per square inch by 145.0377377.
- Equivalently, multiply by 0.006894757293.
- 1 psi = 0.006894757293 MPa · 1 MPa = 145.0377377 psi
Show worked solutionFactor, unit cancellation and rounding, step by step
Find the conversion factor
By definition 1 psi = 6894.75729316836 Pa and 1 MPa = 1000000 Pa, so 1 MPa = 145.037737730209 psi. Source: NIST SP 811 / Handbook 44; BIPM SI Brochure (9th ed.) (SI prefixes and accepted units).
Multiply by the factor written as a fraction
Put psi in the denominator so it cancels, leaving MPa.
Calculate (unrounded)
Round the answer
Rounded to 5 significant figures.
Answer: 0.0068948 MPa
1 psi in other units
Batch convert psi → MPa
- 1 psi = 0.0068948 MPa
- 5 psi = 0.034474 MPa
- 10 psi = 0.068948 MPa
- 25 psi = 0.17237 MPa
Quick examples
- 1 pound per square inch = 0.0068948 megapascals
- 5 pounds per square inch = 0.034474 megapascals
- 10 pounds per square inch = 0.068948 megapascals
- 25 pounds per square inch = 0.17237 megapascals
- 100 pounds per square inch = 0.68948 megapascals
About these units
Pound per square inch (psi)
US & imperial (identical)
1 lbf/in² ≈ 6 894.757 Pa (derived from exact lbf and inch).
1 psi = 6894.757293 Pa
Source: NIST SP 811 / Handbook 44
Megapascal (MPa)
SI (metric)
1 MPa = 1000000 Pa
Source: BIPM SI Brochure (9th ed.) (SI prefixes and accepted units)
Pounds per square inch to megapascals conversion table
| Pounds per square inch (psi) | Megapascals (MPa) |
|---|---|
| 1 psi | 0.0068948 MPa |
| 5 psi | 0.034474 MPa |
| 10 psi | 0.068948 MPa |
| 20 psi | 0.1379 MPa |
| 25 psi | 0.17237 MPa |
| 30 psi | 0.20684 MPa |
| 36 psi | 0.24821 MPa |
| 40 psi | 0.27579 MPa |
| 50 psi | 0.34474 MPa |
| 60 psi | 0.41369 MPa |
| 75 psi | 0.51711 MPa |
| 100 psi | 0.68948 MPa |
| 150 psi | 1.0342 MPa |
| 200 psi | 1.379 MPa |
| 250 psi | 1.7237 MPa |
| 300 psi | 2.0684 MPa |
| 355 psi | 2.4476 MPa |
| 400 psi | 2.7579 MPa |
| 500 psi | 3.4474 MPa |
| 1,000 psi | 6.8948 MPa |
Related conversions
Frequently asked questions
How do I convert pounds per square inch to megapascals?
Use MPa = psi ÷ 145.0377377. Divide the value in pounds per square inch by 145.0377377.
How many megapascals are in 1 pound per square inch?
1 pound per square inch (psi) equals 0.0068948 megapascals (MPa); more precisely 0.006894757293.
How many pounds per square inch are in 1 megapascal?
1 megapascal (MPa) equals 145.04 pounds per square inch (psi); more precisely 145.0377377.
What is 10 psi in MPa?
10 pounds per square inch = 0.068948 megapascals.
What is a pound per square inch?
1 lbf/in² ≈ 6 894.757 Pa (derived from exact lbf and inch).
Formula: MPa = psi ÷ 145.0377377. Factors last reviewed 2026-10-27.