Convert atmosphere to bar
1 atm = 1.01325 bar
1 atm = 1.0132 bar
1 atm in every pressure unit
| microbar | 1,013,300 μbar |
| barye | 1,013,300 Ba |
| millitorr | 760,000 mTorr |
| pascal | 101,330 Pa |
| millimeter of water column | 10,332 mmH₂O |
| pound per square foot | 2,116.2 lb/ft² |
| centimeter of water column | 1,033.2 cmH₂O |
| hectopascal | 1,013.3 hPa |
| millibar | 1,013.3 mbar |
| torr | 760 Torr |
| millimeter of mercury | 760 mmHg |
| inch of water column | 406.78 in w.g. |
| kilopascal | 101.33 kPa |
| foot of water column | 33.899 ft H₂O |
| inch of mercury | 29.921 inHg |
| pound per square inch | 14.696 psi |
| meter of water column | 10.332 m H₂O |
| decibar | 10.133 dbar |
| kilogram-force per square centimeter | 1.0332 kgf/cm² |
| bar | 1.0132 bar |
| atmosphere | 1 atm |
| megapascal | 0.10132 MPa |
| kip per square inch | 0.014696 ksi |
| gigapascal | 0.00010132 GPa |
| million pounds per square inch | 0.000014696 Mpsi |
How the conversion works
Multiply by 1.01325 to go from atmosphere to bar, 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? bar to atmosphere — 1 bar = 0.9869232667 atm.
atmosphere to bar — common values
| 1 atm | 1.01325 bar |
| 2 atm | 2.0265 bar |
| 3 atm | 3.03975 bar |
| 5 atm | 5.06625 bar |
| 10 atm | 10.1325 bar |
| 15 atm | 15.19875 bar |
| 20 atm | 20.265 bar |
| 25 atm | 25.33125 bar |
| 50 atm | 50.6625 bar |
| 75 atm | 75.99375 bar |
| 100 atm | 101.325 bar |
| 250 atm | 253.3125 bar |
| 500 atm | 506.625 bar |
| 1000 atm | 1,013.25 bar |