Convert inch of mercury to millimeter of mercury
1 inHg = 25.4 mmHg
1 inHg = 25.4 mmHg
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 25.4 to go from inch of mercury to millimeter of mercury, 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? millimeter of mercury to inch of mercury — 1 mmHg = 0.03937007874 inHg.
inch of mercury to millimeter of mercury — common values
| 1 inHg | 25.4 mmHg |
| 2 inHg | 50.8 mmHg |
| 3 inHg | 76.2 mmHg |
| 5 inHg | 127 mmHg |
| 10 inHg | 254 mmHg |
| 15 inHg | 381 mmHg |
| 20 inHg | 508 mmHg |
| 25 inHg | 635 mmHg |
| 50 inHg | 1,270 mmHg |
| 75 inHg | 1,905 mmHg |
| 100 inHg | 2,540 mmHg |
| 250 inHg | 6,350 mmHg |
| 500 inHg | 12,700 mmHg |
| 1000 inHg | 25,400 mmHg |
Other pressure conversions
Pa → mmHgkPa → mmHgMPa → mmHgbar → mmHgatm → mmHgpsi → mmHginHg → PainHg → kPa