What Units Are Used to Measure Air Pressure?
Quick Answer
Air pressure, the force exerted on a mass by the weight of air particles, is measured in either inches of mercury or in millibars, represented by inHg and mb, respectively. One standard atmosphere, represented by the symbol atm, is equal to 29.92 inHg, or 1013.25 mb.
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High air pressure in excess of 29.92 inHg, or 1013.25 mb, indicates a high concentration of air particles at the surface. In meteorology, high air pressure systems are associated with clear weather conditions. Low air pressure, or air pressure below 29.92 inHg, or 1013.25 mb, indicates the lifting of air particles away from the surface. In meteorology, low air pressure systems are associated with poor weather conditions. For example, in the eye wall of a hurricane, the air pressure can dip to as low as 990 mb.
Learn more about AtmosphereRelated Questions
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Q:
What Is Considered Low Barometric Pressure?
A: Barometric pressure of under 29.50 inches of mercury at sea level is considered low. At sea level, a normal barometer reading is between about 29.70 inches... Full Answer >Filed Under: -
Q:
Does Air Have Mass?
A: Although it is not very much, air does have mass. Air is matter. In chemistry, the definition of matter is given as any substance that has mass and occupi... Full Answer >Filed Under: -
Q:
How Do You Use Barometric Pressure Conversion to Get Measurements in Millibars?
A: To convert inches of mercury to millibars, multiply the number of inches by 33.8637526. For instance, 31.01 inches of mercury equals slightly more than 1,0... Full Answer >Filed Under: -
Q:
What Causes Air Pressure?
A: Air pressure is caused by the weight of the air pressing down on the Earth, the ocean and the air below. Air pressure is also known as atmospheric pressure... Full Answer >Filed Under:
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