Convert Bar to Atmospheres
One bar equals 0.986923 atmospheres. Type any value to convert bar to atmospheres instantly — with a full reference table below.
Convert Bar to Atmospheres
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How to convert Bar to Atmospheres
To convert bar to atmospheres, multiply by 0.986923. One bar equals 0.986923 atm, and one atmosphere equals 1.01325 bar.
- Take the value in bar — for example 7.5 bar.
- Multiply by 0.986923 (the number of atmospheres in one bar).
- 7.5 × 0.986923 = 7.401925 atm.
Quick mental estimate: Divide the number of bar by 1 (within 1.3% of the exact answer).
Bar to Atmospheres conversion table
| Bar | Atmospheres |
|---|---|
| 1 bar | 0.986923 atm |
| 2 bar | 1.973847 atm |
| 5 bar | 4.934616 atm |
| 10 bar | 9.869233 atm |
| 15 bar | 14.80385 atm |
| 20 bar | 19.73847 atm |
| 30 bar | 29.6077 atm |
| 32 bar | 31.58154 atm |
| 40 bar | 39.47693 atm |
| 50 bar | 49.34616 atm |
| 100 bar | 98.69233 atm |
| Atmospheres | Bar |
|---|---|
| 1 atm | 1.01325 bar |
| 2 atm | 2.0265 bar |
| 5 atm | 5.06625 bar |
| 10 atm | 10.1325 bar |
| 15 atm | 15.19875 bar |
| 20 atm | 20.265 bar |
| 30 atm | 30.3975 bar |
| 32 atm | 32.424 bar |
| 40 atm | 40.53 bar |
| 50 atm | 50.6625 bar |
| 100 atm | 101.325 bar |
About converting Bar to Atmospheres
Bar (bar) and Atmospheres (atm) are both units of pressure. The exact factor is 1 bar = 0.986923 atm, so multiply by 0.986923 to go from bar to atmospheres (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Atmospheres to Bar converter, or the full unit converter for every unit at once.
Real-world pressure in bar and atmospheres
| Example | Bar | Atmospheres |
|---|---|---|
| A systolic blood pressure of 120 mmHg | 0.159987 bar | 0.157895 atm |
| A pressure cooker's over-pressure (15 psi) | 1.034214 bar | 1.020689 atm |
| The standard atmosphere | 1.01325 bar | 1 atm |
| A typical car tyre (32 psi) | 2.206322 bar | 2.177471 atm |
| An espresso machine (9 bar) | 9 bar | 8.882309 atm |
| A road-bike tyre (90 psi) | 6.205282 bar | 6.124137 atm |
| A scuba cylinder (200 bar) | 200 bar | 197.3847 atm |
“≈” marks typical values; the rest are defined or measured figures.
The units
Exactly 100,000 Pa — very close to atmospheric pressure at sea level.
Used for: Tyre pressure in Europe and India, scuba, espresso machines.
The standard atmosphere: exactly 101,325 Pa, average sea-level air pressure.
Used for: Chemistry, diving and physics.
The bar (100,000 Pa) and the standard atmosphere (101,325 Pa) are exact; psi is derived from the pound-force and the inch, so its factor is a rounded value of an exact fraction.