Convert bar to atmospheres
Enter a value in bar (bar) to get atmospheres (atm). One bar is 0.986923 atmospheres; one standard atmosphere is 1.0132 bar.
How to use the Bar to standard atmosphere
- Type the number of bar.
- Click Convert.
- Read the result in atmospheres, plus the same value in every other pressure unit.
bar to atm formula
atmospheres = bar × 0.986923. To go the other way, bar = atmospheres × 1.0132 (see atmospheres to bar).
Worked example
12 bar × 0.986923 = 11.8431 atm.
Bar to atmospheres conversion table
| Bar | Atmospheres |
|---|---|
| 0.1 bar | 0.098692 atm |
| 0.5 bar | 0.493462 atm |
| 1 bar | 0.986923 atm |
| 2 bar | 1.9738 atm |
| 3 bar | 2.9608 atm |
| 5 bar | 4.9346 atm |
| 10 bar | 9.8692 atm |
| 20 bar | 19.7385 atm |
| 25 bar | 24.6731 atm |
| 50 bar | 49.3462 atm |
| 100 bar | 98.6923 atm |
| 250 bar | 246.7308 atm |
| 500 bar | 493.4616 atm |
| 1,000 bar | 986.9233 atm |
About the bar
Almost exactly one atmosphere. Tyres, scuba tanks and espresso machines in Europe.
About the standard atmosphere
Mean sea-level air pressure, exactly 101,325 Pa.
Related conversions
atmospheres to bar · bar to kilopascals · bar to pounds per square inch · any unit.
Frequently asked questions
How many atmospheres in a bar?
0.986923 atmospheres.
How many bar in a standard atmosphere?
1.0132 bar.
Is the factor exact?
The factor 0.986923 is derived from the units' exact definitions; only the display is rounded.
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Last updated 2026-09-23.