Convert inch of mercury to pound per square inch
1 inHg = 0.4911541475 psi
1 inHg = 0.491 psi
1 inHg in every pressure unit
| pascal | 3,390 Pa |
| kilopascal | 3.39 kPa |
| megapascal | 0.00339 MPa |
| bar | 0.0339 bar |
| atmosphere | 0.0334 atm |
| millimeter of mercury | 25.4 mmHg |
| pound per square inch | 0.491 psi |
| foot of water column | 1.13 ft H₂O |
| gigapascal | 0.00000339 GPa |
| kip per square inch | 0.000491 ksi |
| inch of mercury | 1 inHg |
| inch of water column | 13.6 in w.g. |
How the conversion works
Multiply by 0.4911541475 to go from inch of mercury to pound per square inch, 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? pound per square inch to inch of mercury — 1 psi = 2.036020677 inHg.
inch of mercury to pound per square inch — common values
| 1 inHg | 0.49115415 psi |
| 2 inHg | 0.98230829 psi |
| 3 inHg | 1.4734624 psi |
| 5 inHg | 2.4557707 psi |
| 10 inHg | 4.9115415 psi |
| 15 inHg | 7.3673122 psi |
| 20 inHg | 9.8230829 psi |
| 25 inHg | 12.278854 psi |
| 50 inHg | 24.557707 psi |
| 75 inHg | 36.836561 psi |
| 100 inHg | 49.115415 psi |
| 250 inHg | 122.78854 psi |
| 500 inHg | 245.57707 psi |
| 1000 inHg | 491.15415 psi |