A pressure unit where 1 mmHg ≈ 133.322 pascals, derived from mercury barometers. Used in medicine for blood pressure measurement (e.g., “120/80 mmHg”) and occasionally in older vacuum gauges. Universally used in Chinese hospitals for blood pressure readings, although the international standard recommends kilopascals (kPa); clinical practice still retains mmHg.

A pressure unit where 1 mmHg ≈ 133.322 pascals, derived from mercury barometers. Used in medicine for blood pressure measurement (e.g., “120/80 mmHg”) and occasionally in older vacuum gauges. Universally used in Chinese hospitals for blood pressure readings, although the international standard recommends kilopascals (kPa); clinical practice still retains mmHg.