At sea level, the weight of the air above this unit area would (on average) weigh 14.7 pounds! That means pressure applied by this air on the unit area would be

**14.7 pounds per square inch**. Meteorologists use a metric unit for pressure called a millibar and the average pressure at sea level is 1013.25 millibars.Considering this, what is atmospheric pressure in Pascals?

Standard

**atmosphere**. The standard**atmosphere**(symbol:**atm**) is a unit of**pressure**defined as 101325**Pa**(1.01325 bar), equivalent to 760 mmHg (torr), 29.92 inches Hg and 14.696 psi.What is atmospheric pressure in SI units?

Pressure—the effect of a force applied to a surface—is a derived unit, obtained from combining base units. The unit of pressure in the SI system is the pascal (Pa), defined as a force of one Newton per square meter. The conversion between atm, Pa, and torr is as follows:

**1 atm**=**101325 Pa**=**760 torr**.What is the unit of measure for atmospheric pressure?

As mentioned, a mercury barometer makes measurements in inches of Mercury (in Hg). Pounds per square

**inch**(abbreviated as**p.s.i.**) is common in the English system of units, and the**pascal**(abbreviated Pa) is the standard in the Metric (SI) system.