"When a gauge pressure reading indicates 30 psi, what is the absolute pressure?"

Engineering · College · Wed Jan 13 2021

Answered on

To calculate the absolute pressure when you know the gauge pressure, you need to add the atmospheric pressure to the gauge pressure since gauge pressure is measured relative to atmospheric pressure, not in absolute terms. At sea level, the standard atmospheric pressure is approximately 14.7 psi (pounds per square inch).

So, if your gauge pressure reading is 30 psi, the absolute pressure would be:

Absolute pressure = Gauge pressure + Atmospheric pressure Absolute pressure = 30 psi + 14.7 psi Absolute pressure = 44.7 psi

Therefore, the absolute pressure when the gauge pressure reading indicates 30 psi is 44.7 psi, assuming that the atmospheric pressure is the standard 14.7 psi and you are at sea level.

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