What is the equivalent pressure when converting 12 psia to inches of mercury (Hg)?

To convert pressure from pounds per square inch absolute (psia) to inches of mercury (inHg), you can use the conversion factor that 1 psia is approximately equal to 0. militers of mercury. Specifically, 1 psia equals about 2.036 inHg.

First, you need to convert 12 psia to inHg using the conversion factor:

12 psia × 2.036 inHg/psia = 24.432 inHg

However, keep in mind that when dealing with absolute pressure, you must subtract atmospheric pressure to convert to gauge pressure before applying the conversion. Atmospheric pressure at sea level is approximately 14.7 psia, and when you subtract this value from the absolute pressure, you get:

12 psia - 14.7 psia = -2.7 psig (which we cannot convert directly as pressure cannot be negative for this calculation).

Instead, focusing directly on converting absolute values without subtracting atmospheric pressure gives us an understanding of the total force exerted by the pressure provided.

Using the correct conversion for only the absolute part provides a better understanding of typical operational pressures relative to a vacuum or lower pressures. To find the correct pressure in inches of mercury,