Question 1

How do I convert cmHg to mmHg?

Accepted Answer

Multiply by 10. 1 cmHg = 10 mmHg. The "cm" and "mm" are height of mercury column.

Question 2

Why is mercury used for pressure?

Accepted Answer

Mercury is dense (13.6 g/cm³), so pressure columns are manageable height. 760 mmHg = 1 atm = 10.33 m of water.

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.

Cmhg to Mmhg Pressure Converter - Free Online Tool

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