Convert Pascals to Atmospheres
1 pascal is 0.00001 atm. One pascal is exactly 0.00000986923266716 atmospheres.
One pascal is 9.8692 × 10^-6 atmospheres. To convert pascals to atmospheres, multiply by 9.8692 × 10^-6; to go the other way, divide by 9.8692 × 10^-6 or multiply by 101325. The factor is exact rather than rounded: it follows from NIST Special Publication 811. The SI unit: one newton spread over one square metre.
Factor checked against the defining standard · How we check
- Pascals × 9.8692 × 10^-6
value * 0.000009869232667160 atm
1 pascal in every pressure unit
| Unit | Value | Exact factor |
|---|---|---|
| pounds per square inch | 0.0001450377377 psi | × 0.00014503773773 |
| bars | 0.00001 bar | × 0.00001 |
| pascals (as entered) | 1 Pa | — |
| kilopascals | 0.001 kPa | × 0.001 |
| megapascals | 0.000001 MPa | × 0.000001 |
| atmospheres | 0.000009869232667 atm | × 0.00000986923266716 |
| torr | 0.007500616827 Torr | × 0.00750061682704 |
| inches of mercury | 0.0002952998016 inHg | × 0.000295299801647 |
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 pascals to atmospheres?
- 1.Take the measurement in pascals.
- 2.Multiply by 9.8692 × 10^-6 — that is how many atmospheres fit in one pascal.
- 3.To go back the other way, divide by 9.8692 × 10^-6, or multiply by 101325.
Worked example: 25 pascals to atmospheres
- Formula
- Pa × 9.8692 × 10^-6 = atm
- Arithmetic
- 25 × 9.8692 × 10^-6 = 0.000247 atm
- Answer
- 25 Pa = 0.000247 atm
The factor is rounded for display; the figure above is computed from the full value.
Pascals to atmospheres conversion table
| Pascals | Atmospheres |
|---|---|
| 1 Pa | 0.00001 atm |
| 2 Pa | 0.00002 atm |
| 3 Pa | 0.00003 atm |
| 4 Pa | 0.000039 atm |
| 5 Pa | 0.000049 atm |
| 6 Pa | 0.000059 atm |
| 7 Pa | 0.000069 atm |
| 8 Pa | 0.000079 atm |
| 9 Pa | 0.000089 atm |
| 10 Pa | 0.000099 atm |
| 12 Pa | 0.000118 atm |
| 15 Pa | 0.000148 atm |
| 20 Pa | 0.000197 atm |
| 25 Pa | 0.000247 atm |
| 50 Pa | 0.000493 atm |
| 100 Pa | 0.000987 atm |
| 200 Pa | 0.001974 atm |
| 300 Pa | 0.002961 atm |
| 500 Pa | 0.004935 atm |
| 1000 Pa | 0.009869 atm |
| 2000 Pa | 0.019738 atm |
| 5000 Pa | 0.049346 atm |
| 10000 Pa | 0.098692 atm |
What is a pascal?
The SI unit: one newton spread over one square metre. It is a small pressure — a sheet of paper resting on a table is about one pascal — which is why the kilopascal is what instruments actually read.
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 pascal?
One pascal is 9.8692 × 10^-6 atmospheres. Going the other way, one standard atmosphere is 101325 pascals. 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 pascal?
- 9.8692 × 10^-6. 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 pascals?
- Divide by 9.8692 × 10^-6, or multiply by 101325 — they are the same operation.
Other pressure conversions
Atmospheres to pascals — the same conversion the other way.