Convert bar to atmosphere
1 bar = 0.9869232667 atm
1 bar = 0.987 atm
1 bar in every pressure unit
| pascal | 100,000 Pa |
| kilopascal | 100 kPa |
| megapascal | 0.1 MPa |
| bar | 1 bar |
| atmosphere | 0.987 atm |
| millimeter of mercury | 750 mmHg |
| pound per square inch | 14.5 psi |
| foot of water column | 33.5 ft H₂O |
| gigapascal | 0.0001 GPa |
| kip per square inch | 0.0145 ksi |
| inch of mercury | 29.5 inHg |
| inch of water column | 401 in w.g. |
How the conversion works
Multiply by 0.9869232667 to go from bar to atmosphere, or divide by it to go back. Every conversion on this site routes through the SI value (Pa) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? atmosphere to bar — 1 atm = 1.01325 bar.
bar to atmosphere — common values
| 1 bar | 0.98692327 atm |
| 2 bar | 1.9738465 atm |
| 3 bar | 2.9607698 atm |
| 5 bar | 4.9346163 atm |
| 10 bar | 9.8692327 atm |
| 15 bar | 14.803849 atm |
| 20 bar | 19.738465 atm |
| 25 bar | 24.673082 atm |
| 50 bar | 49.346163 atm |
| 75 bar | 74.019245 atm |
| 100 bar | 98.692327 atm |
| 250 bar | 246.73082 atm |
| 500 bar | 493.46163 atm |
| 1000 bar | 986.92327 atm |