Convert Megapascals to Atmospheres
1 megapascal is 9.869233 atm. One megapascal is exactly 9.86923266716 atmospheres.
One megapascal is 9.8692327 atmospheres. To convert megapascals to atmospheres, multiply by 9.8692327; to go the other way, divide by 9.8692327 or multiply by 0.101325. 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 × 9.8692327
value * 9.869232667169.869 atm
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 atmospheres?
- 1.Take the measurement in megapascals.
- 2.Multiply by 9.8692327 — that is how many atmospheres fit in one megapascal.
- 3.To go back the other way, divide by 9.8692327, or multiply by 0.101325.
Worked example: 25 megapascals to atmospheres
- Formula
- MPa × 9.8692327 = atm
- Arithmetic
- 25 × 9.8692327 = 246.730817 atm
- Answer
- 25 MPa = 246.730817 atm
The factor is rounded for display; the figure above is computed from the full value.
Megapascals to atmospheres conversion table
| Megapascals | Atmospheres |
|---|---|
| 1 MPa | 9.869233 atm |
| 2 MPa | 19.738465 atm |
| 3 MPa | 29.607698 atm |
| 4 MPa | 39.476931 atm |
| 5 MPa | 49.346163 atm |
| 6 MPa | 59.215396 atm |
| 7 MPa | 69.084629 atm |
| 8 MPa | 78.953861 atm |
| 9 MPa | 88.823094 atm |
| 10 MPa | 98.692327 atm |
| 12 MPa | 118.430792 atm |
| 15 MPa | 148.03849 atm |
| 20 MPa | 197.384653 atm |
| 25 MPa | 246.730817 atm |
| 50 MPa | 493.461633 atm |
| 100 MPa | 986.923267 atm |
| 200 MPa | 1,973.846533 atm |
| 300 MPa | 2,960.7698 atm |
| 500 MPa | 4,934.616334 atm |
| 1000 MPa | 9,869.232667 atm |
| 2000 MPa | 19,738.465334 atm |
| 5000 MPa | 49,346.163336 atm |
| 10000 MPa | 98,692.326672 atm |
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 standard atmosphere?
Exactly 101,325 pascals by definition, not by measurement — it was fixed as a reference, and the real pressure outside your window is never precisely it.
How many atmospheres are in a megapascal?
One megapascal is 9.8692327 atmospheres. Going the other way, one standard atmosphere is 0.101325 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 atmospheres are in a megapascal?
- 9.8692327. Exactly 101,325 pascals by definition, not by measurement — it was fixed as a reference, and the real pressure outside your window is never precisely it.
- How do I convert atmospheres back to megapascals?
- Divide by 9.8692327, or multiply by 0.101325 — they are the same operation.
Other pressure conversions
Atmospheres to megapascals — the same conversion the other way.