Convert bar to atmospheres and atm to bar instantly. Bidirectional pressure converter with formula and common values.
Multiply the bar value by 0.986923 to get atmospheres. The bar and atmosphere are close in magnitude, both representing roughly sea-level pressure.
| Bar | Atmospheres |
|---|---|
| 0.5 | 0.4935 |
| 1 | 0.9869 |
| 2 | 1.9738 |
| 3 | 2.9608 |
| 5 | 4.9346 |
| 7.5 | 7.4019 |
| 15 | 14.804 |
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One bar equals approximately 0.986923 atmospheres. A bar is slightly less than one atmosphere.
Multiply the bar value by 0.986923. For example, 2.5 bar × 0.986923 = 2.467 atm.
Not exactly. One bar is 100,000 Pa while one atmosphere is 101,325 Pa. They differ by about 1.3%, but for rough estimates they are often treated as equal.
IUPAC defines standard pressure as exactly 1 bar (100 kPa), which replaced the older standard of 1 atm (101.325 kPa) in 1982.