Question 1

How do I convert hPa to inches of mercury?

Accepted Answer

Divide by 33.86. 1013 hPa = 29.92 inHg (standard atmosphere). Used in US aviation weather.

Question 2

What is normal barometric pressure in inHg?

Accepted Answer

29.92 inHg at sea level. Range 29-31 inHg typical. Below 29 = low pressure/storm. Above 30 = high pressure/clear.

Question 3

What pressure units do different industries use?

Accepted Answer

PSI in US/UK automotive and HVAC. Bar/kPa in European engineering. mmHg/torr in medicine. Atmospheres in diving and altitude.

Question 4

Is gauge pressure different from absolute pressure?

Accepted Answer

Yes! Gauge pressure reads 0 at atmospheric pressure. Absolute pressure adds atmospheric (~14.7 psi). Vacuum gauge shows negative gauge pressure.

hPa to inHg Converter

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