Before digital sensors, pressure was literally the height of a mercury column in a glass tube — and the millimeter of mercury, mmHg, still haunts blood pressure cuffs, vacuum gauges, and chemistry textbooks. Its anchor to the modern world is beautifully simple: 760 mmHg equals one standard atmosphere, which is exactly 101,325 pascals. Multiply mmHg by 133.3224 and you land on Pascals (Pa); the sibling boxes give Kilopascals (kPa) at 0.1333224, Bar at 0.001333224, PSI at 0.01933678, and Millibars (mbar) at 1.333224 per mmHg. Enter the classic 760 and watch the whole constellation light up: 101,325 Pa, 101.325 kPa, 1.01325 bar, 14.6959 PSI, and 1013.25 mbar. Americans meet this unit most often at the doctor's office, where a reading of 120/80 is millimeters of mercury, and divers meet it in decompression tables where every mmHg of partial pressure counts. One practical trap: the torr is defined as 1/760 of an atmosphere, so mmHg and torr are essentially twins — identical to five decimal places.

With the pre-filled defaults — mmHg 760 — the Mmhg Converter returns Pascals (Pa) 101,325.02, Kilopascals (kPa) 101.3250, Bar 1.013250, PSI 14.6960, Millibars (mbar) 1,013.25. Change any input and those results update instantly, so you can see exactly how each number you enter moves the answer.