How many psig in 1 psi?
The answer is 1.

We assume you are converting between **pound/square inch [gauge]** and **pound/square inch**.

You can view more details on each measurement unit:

psig or
psi

The SI derived unit for **pressure** is the pascal.

1 pascal is equal to 0.000145037738007 psig, or 0.000145037738007 psi.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between pounds/square inch and pounds/square inch.

Type in your own numbers in the form to convert the units!

Psig (pound-force per square inch gauge) is a unit of pressure relative to the surrounding atmosphere. By contrast, psia measures pressure relative to a vacuum (such as that in space). At sea level, Earth's atmosphere actually exerts a pressure of 14.7 psi. Humans do not feel this pressure because internal pressure of liquid in their bodies matches the external pressure. If a pressure gauge is calibrated to read zero in space, then at sea level on Earth it would read 14.7 psi. Thus a reading of 30 psig on a tire gauge represents an absolute pressure of 44.7 psi.

The pound per square inch or, more accurately, pound-force per square inch (symbol: psi or lbf/inē or lbf/inē) is a unit of pressure or of stress based on avoirdupois units. It is the pressure resulting from a force of one pound-force applied to an area of one square inch.

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