Convert Megapascals to Pounds per square inch
1 megapascal is 145.037738 psi. One megapascal is exactly 145.03773773 pounds per square inch.
One megapascal is 145.03774 pounds per square inch. To convert megapascals to pounds per square inch, multiply by 145.03774; to go the other way, divide by 145.03774 or multiply by 0.0068947573. The factor is exact rather than rounded: it follows from NIST Special Publication 811. A million pascals.
Factor checked against the defining standard · How we check
- Megapascals × 145.03774
value * 145.03773773145.038 psi
1 megapascal in every pressure unit
| Unit | Value | Exact factor |
|---|---|---|
| pounds per square inch | 145.0377377 psi | × 145.03773773 |
| bars | 10 bar | × 10 |
| pascals | 1,000,000 Pa | × 1,000,000 |
| kilopascals | 1,000 kPa | × 1,000 |
| megapascals (as entered) | 1 MPa | — |
| atmospheres | 9.869232667 atm | × 9.86923266716 |
| torr | 7,500.616827 Torr | × 7,500.61682704 |
| inches of mercury | 295.2998016 inHg | × 295.299801647 |
Factors are entered by hand from NIST Special Publication 811 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert megapascals to pounds per square inch?
- 1.Take the measurement in megapascals.
- 2.Multiply by 145.03774 — that is how many pounds per square inch fit in one megapascal.
- 3.To go back the other way, divide by 145.03774, or multiply by 0.0068947573.
Worked example: 25 megapascals to pounds per square inch
- Formula
- MPa × 145.03774 = psi
- Arithmetic
- 25 × 145.03774 = 3,625.943443 psi
- Answer
- 25 MPa = 3,625.943443 psi
The factor is rounded for display; the figure above is computed from the full value.
Megapascals to pounds per square inch conversion table
| Megapascals | Pounds per square inch |
|---|---|
| 1 MPa | 145.037738 psi |
| 2 MPa | 290.075475 psi |
| 3 MPa | 435.113213 psi |
| 4 MPa | 580.150951 psi |
| 5 MPa | 725.188689 psi |
| 6 MPa | 870.226426 psi |
| 7 MPa | 1,015.264164 psi |
| 8 MPa | 1,160.301902 psi |
| 9 MPa | 1,305.33964 psi |
| 10 MPa | 1,450.377377 psi |
| 12 MPa | 1,740.452853 psi |
| 15 MPa | 2,175.566066 psi |
| 20 MPa | 2,900.754755 psi |
| 25 MPa | 3,625.943443 psi |
| 50 MPa | 7,251.886887 psi |
| 100 MPa | 14,503.773773 psi |
| 200 MPa | 29,007.547546 psi |
| 300 MPa | 43,511.321319 psi |
| 500 MPa | 72,518.868865 psi |
| 1000 MPa | 145,037.73773 psi |
| 2000 MPa | 290,075.47546 psi |
| 5000 MPa | 725,188.68865 psi |
| 10000 MPa | 1,450,377.3773 psi |
What is a megapascal?
A million pascals. Concrete strength and hydraulic ratings are specified here: 30 MPa concrete is about 4,350 psi.
What is a pound per square inch?
A pound-force spread over a square inch. Exact, because both parts are: it is 4.4482216152605 newtons divided by an inch squared. Every US tyre gauge, air line and pressure washer is marked in it.
How many pounds per square inch are in a megapascal?
One megapascal is 145.03774 pounds per square inch. Going the other way, one pound per square inch is 0.0068947573 megapascals. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every pressure unit here
| Unit | Symbol | One of these is |
|---|---|---|
| Pounds per square inch | psi | 6894.7573 pascal |
| Bars | bar | 100000 pascal |
| Pascals | Pa | the base unit |
| Kilopascals | kPa | 1000 pascal |
| Megapascals | MPa | 1000000 pascal |
| Atmospheres | atm | 101325 pascal |
| Torr | Torr | 133.32237 pascal |
| Inches of mercury | inHg | 3386.389 pascal |
Questions people actually ask
- How many pounds per square inch are in a megapascal?
- 145.03774. A pound-force spread over a square inch. Exact, because both parts are: it is 4.4482216152605 newtons divided by an inch squared. Every US tyre gauge, air line and pressure washer is marked in it.
- How do I convert pounds per square inch back to megapascals?
- Divide by 145.03774, or multiply by 0.0068947573 — they are the same operation.
Other pressure conversions
Pounds per square inch to megapascals — the same conversion the other way.