# What is the relation between gauge pressure and absolute pressure?

**Absolute pressure**is measured in

**relation**to the vacuum, while

**gauge pressure**is the

**difference between**the

**absolute pressure**and the atmospheric

**pressure**. 2.

**Absolute pressure**uses

**absolute**zero as it's zero point, while

**gauge pressure**uses atmospheric

**pressure**as it's zero point.

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Also question is, how do you convert gauge pressure to absolute pressure?

**Absolute pressure** = Guage **pressure** + Atmospheric **pressure**. So for **converting gauge pressure** into **absolute pressure**, just add atmospheric **pressure** in it.

Likewise, what does gauge pressure mean? **Gauge pressure is** the **pressure** measured relative to the ambient atmospheric **pressure**. So the air around us has a **gauge pressure** of millibars/PSI/whatever. So **gauge pressure is** absolute **pressure** minus atmospheric **pressure**.

Similarly, it is asked, which equation describes the relationship between gauge pressure absolute pressure and atmospheric pressure?

This happens because of Pascal's principle. The total **pressure**, or **absolute pressure**, is thus the sum of **gauge pressure and atmospheric pressure**: P_{abs} = P_{g} + P_{atm} where P_{abs} is **absolute pressure**, P_{g} is **gauge pressure**, and P_{atm} is **atmospheric pressure**.

What is an absolute pressure?

Definition of **absolute pressure**. : total **pressure** at a point in a fluid equaling the sum of the gauge and the atmospheric **pressures**.