Convert millimeter of mercury to atmosphere
1 mmHg = 0.001315789661 atm
1 mmHg = 0.00132 atm
1 mmHg in every pressure unit
| pascal | 133 Pa |
| kilopascal | 0.133 kPa |
| megapascal | 0.000133 MPa |
| bar | 0.00133 bar |
| atmosphere | 0.00132 atm |
| millimeter of mercury | 1 mmHg |
| pound per square inch | 0.0193 psi |
| foot of water column | 0.0446 ft H₂O |
| gigapascal | 1.33e-07 GPa |
| kip per square inch | 0.0000193 ksi |
| inch of mercury | 0.0394 inHg |
| inch of water column | 0.535 in w.g. |
How the conversion works
Multiply by 0.001315789661 to go from millimeter of mercury 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 millimeter of mercury — 1 atm = 759.9998917 mmHg.
millimeter of mercury to atmosphere — common values
| 1 mmHg | 0.0013157897 atm |
| 2 mmHg | 0.0026315793 atm |
| 3 mmHg | 0.003947369 atm |
| 5 mmHg | 0.0065789483 atm |
| 10 mmHg | 0.013157897 atm |
| 15 mmHg | 0.019736845 atm |
| 20 mmHg | 0.026315793 atm |
| 25 mmHg | 0.032894742 atm |
| 50 mmHg | 0.065789483 atm |
| 75 mmHg | 0.098684225 atm |
| 100 mmHg | 0.13157897 atm |
| 250 mmHg | 0.32894742 atm |
| 500 mmHg | 0.65789483 atm |
| 1000 mmHg | 1.3157897 atm |