What pressure is reported by ATC?

Air Traffic Control (ATC) typically reports atmospheric pressure in inches of Mercury (inHg) or hectopascals (hPa), depending on the region. In the United States, the standard pressure setting is often 29.92 inHg, while in other countries, it may be reported in hPa, with 1013.25 hPa being the standard atmospheric pressure at sea level. Pilots use this pressure information to adjust their altimeters, ensuring accurate altitude readings during flight.