1 atm = 29.921252814868 inHg
1 Atmosphere (atm) = 29.921252814868 Inch of mercury (inHg).
If you want to reverse convert, use Inch of mercury → Atmosphere. 1 inHg = 0.033421060481235 atm. You can also explore the full Pressure converter page for more cross conversions.
Conversion formula
Atmosphere to Inch of mercury formula: value in inHg = value in atm × 29.921252814868.
Inch of mercury to Atmosphere formula: value in atm = value in inHg × 0.033421060481235.
How to convert Atmosphere to Inch of mercury
To convert Atmosphere to Inch of mercury, multiply the value in atm by 29.921252814868. This gives the result in inHg.
For example, 1 atm = 29.921252814868 inHg and 10 atm = 299.21252814868 inHg.
What is Atmosphere?
Atmosphere (atm): A reference pressure for comparing gas conditions, rather than a reading of today’s weather. 1 atm = 101 325 Pa.
What is Inch of mercury?
Inch of mercury (inHg): A mercury-column scale used in some aviation altimeters and weather reports. 1 inHg ≈ 3386.38895 Pa.
FAQ
How many inch of mercury are in 1 atmosphere?
There are 29.921252814868 inHg in 1 atm.
Why can conversion results differ slightly?
Check the unit definition and rounding. US and imperial measures can differ; rounding intermediate values can also change the final digits.
How do I convert atmosphere to inch of mercury?
Multiply the value in atm by 29.921252814868 to get the value in inHg.
Atmosphere → other Pressure units
- 1 atmosphere = 101325 pascal
- 1 atmosphere → hectopascal = 1013.25 hectopascal
- 1 atmosphere → kilopascal = 101.325 kilopascal
- 1 atmosphere → megapascal = 0.101325 megapascal
- 1 atmosphere → bar = 1.01325 bar
- 1 atmosphere → millibar = 1013.25 millibar
- 1 atmosphere → pounds per square inch = 14.695943005993 pounds per square inch
- 1 atmosphere → torr = 760.00210017852 torr
- 1 atmosphere → millimeter of mercury = 760.00210017852 millimeter of mercury
- 1 atmosphere → inch of mercury = 29.921252814868 inch of mercury
Atmosphere → Inch of mercury Table
The table below shows common values from Atmosphere to Inch of mercury and the reverse direction for quick reference.
| atm | inHg | Rounded |
|---|---|---|
| 1 atm | 29.921252814868 inHg | 29.9213 |
| 2 atm | 59.842505629735 inHg | 59.8425 |
| 3 atm | 89.763758444603 inHg | 89.7638 |
| 4 atm | 119.68501125947 inHg | 119.6850 |
| 5 atm | 149.60626407434 inHg | 149.6063 |
| 10 atm | 299.21252814868 inHg | 299.2125 |
| 12 atm | 359.05503377841 inHg | 359.0550 |
| 15 atm | 448.81879222301 inHg | 448.8188 |
| 20 atm | 598.42505629735 inHg | 598.4251 |
| 25 atm | 748.03132037169 inHg | 748.0313 |
| 30 atm | 897.63758444603 inHg | 897.6376 |
| 40 atm | 1196.8501125947 inHg | 1196.8501 |
| 50 atm | 1496.0626407434 inHg | 1496.0626 |
| 75 atm | 2244.0939611151 inHg | 2244.0940 |
| 100 atm | 2992.1252814868 inHg | 2992.1253 |
| 200 atm | 5984.2505629735 inHg | 5984.2506 |
| 250 atm | 7480.3132037169 inHg | 7480.3132 |
| 500 atm | 14960.626407434 inHg | 14960.6264 |
| 750 atm | 22440.939611151 inHg | 22440.9396 |
| 1000 atm | 29921.252814868 inHg | 29921.2528 |
| 2500 atm | 74803.132037169 inHg | 74803.1320 |
| 5000 atm | 149606.26407434 inHg | 149606.2641 |
| 10000 atm | 299212.52814868 inHg | 299212.5281 |
Inch of mercury → Atmosphere Table
| inHg | atm | Rounded |
|---|---|---|
| 1 inHg | 0.033421060481235 atm | 0.0334 |
| 2 inHg | 0.066842120962469 atm | 0.0668 |
| 3 inHg | 0.1002631814437 atm | 0.1003 |
| 4 inHg | 0.13368424192494 atm | 0.1337 |
| 5 inHg | 0.16710530240617 atm | 0.1671 |
| 10 inHg | 0.33421060481235 atm | 0.3342 |
| 12 inHg | 0.40105272577482 atm | 0.4011 |
| 15 inHg | 0.50131590721852 atm | 0.5013 |
| 20 inHg | 0.66842120962469 atm | 0.6684 |
| 25 inHg | 0.83552651203087 atm | 0.8355 |
| 30 inHg | 1.002631814437 atm | 1.0026 |
| 40 inHg | 1.3368424192494 atm | 1.3368 |
| 50 inHg | 1.6710530240617 atm | 1.6711 |
| 75 inHg | 2.5065795360926 atm | 2.5066 |
| 100 inHg | 3.3421060481235 atm | 3.3421 |
| 200 inHg | 6.6842120962469 atm | 6.6842 |
| 250 inHg | 8.3552651203087 atm | 8.3553 |
| 500 inHg | 16.710530240617 atm | 16.7105 |
| 750 inHg | 25.065795360926 atm | 25.0658 |
| 1000 inHg | 33.421060481235 atm | 33.4211 |
| 2500 inHg | 83.552651203087 atm | 83.5527 |
| 5000 inHg | 167.10530240617 atm | 167.1053 |
| 10000 inHg | 334.21060481235 atm | 334.2106 |
Inch of mercury → Atmosphere
The reverse value is 1 inHg = 0.033421060481235 atm.