Unit converter
inHg to mmHg converter
1 inHg = 25.4 mmHg. To convert inches of mercury to millimeters of mercury, multiply by 25.4. Example: 29.92 inHg = 760 mmHg (standard sea-level pressure).
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inHg to mmHg table
| inHg | mmHg |
|---|---|
| 1 | 25.4 |
| 5 | 127 |
| 10 | 254 |
| 20 | 508 |
| 25 | 635 |
| 28 | 711.2 |
| 29 | 736.6 |
| 29.5 | 749.3 |
| 29.92 | 759.968 |
| 30 | 762 |
| 30.5 | 774.7 |
| 31 | 787.4 |
About these units
inHg (inches of mercury) and mmHg (millimeters of mercury) both measure pressure: force spread over an area.
- inHg — height of a mercury column in inches. Used for weather and aircraft altimeters in the US.
- hPa / mb — hectopascals, identical to millibars. The standard weather unit worldwide.
- mmHg — millimeters of mercury, also called torr. Used for weather in some countries and for blood pressure.
- kPa — kilopascals (10 hPa). Common in Canada and engineering.
- psi — pounds per square inch. Tires, compressors, vacuum gauges.
mmHg to inHg · All pressure units · What inHg means
Frequently asked questions
How do I convert inHg to mmHg?
To convert inches of mercury to millimeters of mercury, multiply by 25.4. 1 inHg = 25.4 mmHg.
What is standard atmospheric pressure in inHg and mmHg?
Standard sea-level pressure is 29.9213 inHg, which is 759.9999 mmHg.
How many mmHg is 1 inHg?
1 inHg equals 25.4 mmHg, and 1 mmHg equals 0.03937 inHg.