Question 1

How many pascals in 1 torr?

Accepted Answer

1 torr = 133.32 Pa. 760 torr = 1 atm. Torr equals mmHg (virtually identical). Used in vacuum science.

Question 2

What is the difference between torr and mmHg?

Accepted Answer

Essentially none: 1 torr ≡ 1 mmHg (by original definition). Torr is used in vacuum, mmHg in medicine.

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.

Torr to Pa Converter

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