Absolute Pressure Calculator

To determine the sum of gauge and atmospheric pressure, you can use our absolute pressure calculator.

In physics, absolute pressure is the point of pressure that occurs in the fluid point, which is equivalent to the amount of both atmospheric and pressure gauge. Whereas the pressure, which is relative to the atmospheric pressure, indicates the gauge pressure. If the atmospheric pressure is below a gauge pressure, then it is positive pressure; Or if the gauge pressure is beneath the atmospheric pressure, it is harmful. The SI unit of the absolute pressure is psi.


Formula of Absolute Pressure Calculator

To determine the absolute pressure instantly, you can use our calculator, or to find it manually, you can use the formula listed below:

Pabs = Patm + Pgauge


Pabs= Absolute Pressure

Patm = Atmospheric Pressure

Pgauge= Gauge pressure


For a more precise understanding of a concept and to know how to find absolute pressure, let us have an example below:

Suppose a reading of gauge pressure is 31 psi and the atmospheric pressure is 14.2 psi, then find out the absolute pressure.

Given data

Patm = 14.2 psi
Pgauge = 31 psi

To Find

Absolute pressure = ?


To find out the absolute pressure, we will use the formula listed below:

Pabs = Patm + Pgauge

Putting values in the formula:

Pabs = 14.2 psi + 31 psi = 45.2 psi


If you want to get water pressure, you can use our Water Pressure Calculator.

How to use the Absolute Pressure Calculator?

The steps to use the absolute pressure calculator are as follows:

Step 1: Enter the value of atmospheric pressure in the first required input.

Step 1: Enter the value of the gauge pressure in the second required input.

Step 2: The calculator will automatically display an answer on the screen.

Calculator use

You can use our absolute calculator in various physics and other principles, such as; estimating the barometric pressure variations due to variations in massive and below atmospheric pressure produced by weather patterns.