Convert atmosphere to inch of mercury
1 atm = 29.92125558 inHg
1 atm = 29.921 inHg
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 29.92125558 to go from atmosphere to inch 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? inch of mercury to atmosphere — 1 inHg = 0.03342105739 atm.
atmosphere to inch of mercury — common values
| 1 atm | 29.921256 inHg |
| 2 atm | 59.842511 inHg |
| 3 atm | 89.763767 inHg |
| 5 atm | 149.60628 inHg |
| 10 atm | 299.21256 inHg |
| 15 atm | 448.81883 inHg |
| 20 atm | 598.42511 inHg |
| 25 atm | 748.03139 inHg |
| 50 atm | 1,496.0628 inHg |
| 75 atm | 2,244.0942 inHg |
| 100 atm | 2,992.1256 inHg |
| 250 atm | 7,480.3139 inHg |
| 500 atm | 14,960.628 inHg |
| 1000 atm | 29,921.256 inHg |
Other pressure conversions
Pa → inHgkPa → inHgMPa → inHgbar → inHgatm → Paatm → kPaatm → MPaatm → bar