1 inHg = 3,386.389 pascals at 0 °C. Aircraft operating at higher altitudes (above 18,000 feet) set their barometric altimeters to a standard pressure of 29.92 inHg or 1,013.2 hPa (1 hPa = 1 mbar) regardless of the actual sea level pressure, with inches of mercury used in the U.S...
I have a digital weather station with a wireless outdoor sensor. In the photo, the top right quadrant of the display shows temperature and relative humidity for outdoors (6.2°C/94%) and indoors (21.6°C/55%). I find this indoor-outdoor thing fascinating
There are several units of measure for pressure, such as bar (and the respective derivatives such as the above-mentioned mbar), atmosphere (atm), technical atmosphere (at), Pascal (Pa), Torricelli (Torr), mercury millimeter (mmHg), mercury inch (inHg), water inch (inH2O),...