The measurement of pressure relative to the pressure in a vacuum, equal to the sum of the pressure shown on a pressure gauge and atmospheric pressure.

The sum of atmospheric and gage pressure.

Absolute pressure is the gauge pressure plus atmospheric pressure.

Gauge pressure plus barometric pressure. Absolute pressure can be zero only in a perfect vacuum.

The sum of Atmospheric Pressure

Pressure measured relative to a vacuum (absolute zero).

Gauge pressure + atmospheric pressure. (Sometimes referred to with “a” on end – e.g. Bara, Psia.) 

Pressure measured with the base of zero.

Atmospheric pressure added to gauge pressure.

Pressure measured with the base of zero.

The indicated value of the weight of the earth's atmosphere. At sea level this value is approximately 14.65 psi (pounds per square inch).

generally taken as gauge pressure + atmospheric pressure, but more precisely the total pressure measured relative to absolute zero pressure (the pressure that would occur in a pure vacuum). Measured in lb/in2 (psi x0.689475729 = N/cm2).

The pressure of a fluid measured above a perfect vacuum (which has zero absolute pressure).  If the pressure of the atmosphere is 101 kPa absolute, this is 101 kPa above absolute zero.  The pressure indicated on a pressure gauge can be converted to absolute pressure by adding atmospheric pressure to the gauge reading.

Total pressure measured from zero.

A measurement of pressure which sets a total vacuum as having a value of zero, abbreviated as psia or bar. Absolute pressure is equal to the sum of a pressure gauge reading and atmospheric pressure (14.69 psia or 1 bar at sea level).

The total of the indicated gage pressure plus the atmospheric pressure. Abbreviated "psia" for pounds per square inch absolute.

Pressure measured with respect to zero pressure. Compare: gauge pressure. (05 Mar 2000)

A measurement of pressure which sets a total vacuum as having a value of zero, abbreviated as psia or bar. Absolute pressure is equal to the sum of a pressure gauge reading and atmospheric pressure (14.69 psia or 1 bar at sea level).

The measure of pressure compared to the absolute zero pressure of an empty space—e.g., a vacuum.

Gauge pressure plus atmospheric pressure (14.7 lbs. per sq. in.).

is the existing gauge pressure plus atmospheric pressure. At sea level the gauge pressure in pounds per square inch (PSI) plus 14.7 gives the absolute pressure in pounds per square inch (PSIA).

The pressure expressed in bar, Pascal or PSI, as measured above a perfect vacuum.

Total pressure measured from an absolute vacuum. It equals the sum of the gauge pressure and the atmospheric pressure corresponding to the barometer (expressed in pounds per square inch).

The measurement of pressure relative to the pressure in a vacuum. It is equal to the sum of the pressure shown on a pressure gauge and atmospheric pressure. Further Reading

Total pressure measured from an absolute vacuum. It equals the sum of the gauge pressure and the atmospheric pressure corresponding to the barometer.

Air at standard conditions (70°F air at sea level with a barometric pressure of 29.92 in Hg) exerts a pressure of 14.696 psi. This is the pressure in a system when the pressure gauge reads zero. So th [..]

The measurement of pressure relative to the pressure in a vacuum. It is equal to the sum of the pressure shown on a pressure gauge and atmospheric pressure. Further Reading