Convert between kilopascals and millimeters of mercury (mmHg) for medical, scientific, and weather applications.
Kilopascals (kPa) and millimeters of mercury (mmHg) are both used to measure pressure, but in very different contexts. mmHg is the standard unit for blood pressure measurement worldwide and is also used in vacuum technology and some weather instruments. kPa is the SI-derived unit used in engineering and international weather reports.
The conversion factor is 1 kPa = 7.50062 mmHg, which means standard atmospheric pressure (101.325 kPa) equals 760 mmHg. This tool converts bidirectionally between these two units and also shows atm, Pa, psi, and bar equivalents. That makes it useful when a medical monitor, mercury-column gauge, or lab note needs to be compared with a metric pressure report without manually moving through several unit systems. It also gives you a fast check on whether a reading is near atmospheric pressure or clearly in the vacuum range.
Healthcare professionals, medical device technicians, and anyone interpreting blood pressure readings in different unit systems will find this converter essential. Normal blood pressure (120/80 mmHg) equals approximately 16.0/10.7 kPa, while 1 atm corresponds to 760 mmHg or 101.325 kPa. Use the result as a clean bridge between clinical, laboratory, and engineering reference points.
kPa and mmHg show up in different medical, laboratory, and weather contexts. This page makes the conversion direct and keeps the familiar blood-pressure and atmospheric reference points visible for quick interpretation. It is especially helpful when the same pressure must be understood in both clinical and engineering language, or when you need a quick check against a known reference point.
kPa to mmHg: mmHg = kPa × 7.50062 mmHg to kPa: kPa = mmHg × 0.133322 kPa to atm: atm = kPa ÷ 101.325 mmHg to atm: atm = mmHg ÷ 760
Result: 120.01 mmHg
16 kPa × 7.50062 = 120.01 mmHg. This corresponds to a normal systolic blood pressure reading.
Most countries use mmHg for blood pressure, but some European countries (particularly parts of Scandinavia and Germany) have used kPa on medical devices. The World Health Organization defines hypertension thresholds in mmHg: 140/90 mmHg = 18.7/12.0 kPa.
The mmHg unit dates back to Torricelli's mercury barometer (1643). A column of mercury 760 mm high balances standard atmospheric pressure. While mercury barometers are being phased out for environmental reasons, the unit persists in medicine and vacuum technology.
Vacuum levels are often expressed as mmHg absolute (distance below atmospheric) or as mmHg vacuum (amount of pressure removed). A reading of 25 mmHg absolute = 735 mmHg vacuum relative to 760 mmHg atmosphere.
Multiply the kPa value by 7.50062. For example, a reading of 16.0/10.7 kPa equals 120/80 mmHg, which is the familiar normal-blood-pressure benchmark used in clinics. Keep both units together when documenting results so future comparisons are easy.
Normal blood pressure (120/80 mmHg) is approximately 16.0/10.7 kPa. Hypertension begins at 140/90 mmHg, which is about 18.7/12.0 kPa, so the converter is handy for translating clinical thresholds.
Very nearly. 1 mmHg = 1.000000142 Torr, so the difference is far smaller than the precision of most practical measurements. In day-to-day work, the two units are usually interchangeable.
Blood pressure measurement originated with mercury sphygmomanometers, which literally measured the height of a mercury column in millimeters. The unit persists even with digital monitors because medical guidelines, device labels, and clinician habit all still use it.
1 mmHg = 0.133322 kPa. That means 760 mmHg, the standard atmosphere reference, equals 101.325 kPa.
High vacuum is below 0.001 mmHg, or about 0.000133 kPa. Medium vacuum ranges from 1-25 mmHg, while low vacuum spans roughly 25-760 mmHg depending on the context.