Convert inch of mercury to millimeter of mercury
1 inHg = 25.4 mmHg
1 inHg = 25.4 mmHg
1 inHg in every pressure unit
| microbar | 33,864 μbar |
| barye | 33,864 Ba |
| millitorr | 25,400 mTorr |
| pascal | 3,386.4 Pa |
| millimeter of water column | 345.32 mmH₂O |
| pound per square foot | 70.726 lb/ft² |
| centimeter of water column | 34.532 cmH₂O |
| hectopascal | 33.864 hPa |
| millibar | 33.864 mbar |
| torr | 25.4 Torr |
| millimeter of mercury | 25.4 mmHg |
| inch of water column | 13.595 in w.g. |
| kilopascal | 3.3864 kPa |
| foot of water column | 1.1329 ft H₂O |
| inch of mercury | 1 inHg |
| pound per square inch | 0.49115 psi |
| meter of water column | 0.34532 m H₂O |
| decibar | 0.33864 dbar |
| kilogram-force per square centimeter | 0.034532 kgf/cm² |
| bar | 0.033864 bar |
| atmosphere | 0.033421 atm |
| megapascal | 0.0033864 MPa |
| kip per square inch | 0.00049115 ksi |
| gigapascal | 0.0000033864 GPa |
| million pounds per square inch | 4.9115e-07 Mpsi |
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