What does mmHg stand for?Īn mmHg is a unit of pressure equal to the extra pressure generated by a column of mercury that is one millimeter high under standard gravity. The torr is not part of the International System of Units (SI Units). ‘T’ is an abbreviation for the tesla unit, which is used to measure the strengths of magnetic fields. Similarly, you may encounter ‘T’ as a symbol for torr, but this is also incorrect. If you see a spelling that uses ‘Tor’, it is not correct but a common mistake. The abbreviation for the unit name torr is Torr, while the unit name is entirely in lower case (torr). Torr is also encountered when it is used to express pressure measurements in a thermodynamic system. We have Torricelli to thank for mercury barometers, modern weather reporting, and manometric pressure readings in areas such as physiology, medicine, general chemistry, industrial chemistry, scuba diving, and car tire pressures. These changes in the pressure exerted by atmospheric pressure are due to weather conditions and can predict the weather.
He explained the principle that small fluctuations in the height of the mercury column were due to changes in atmospheric pressure. Torricelli invented and then demonstrated a mercury barometer to the public in 1644, which subsequently led to the creation of the field of meteorology. The unit is named in honor of Evangelista Torricelli, an Italian physicist, mathematician, and discoverer of barometric pressure theory. It is defined as precisely 1/760 of a standard atmosphere and is equivalent to 133.32 Pascals (Pa). Torr is a unit of pressure based on an absolute scale. Here are the answers to some of the most common questions people ask about the Torr and mmHg pressure measurement units. People often have specific questions about converting Torr to mmHg and other unit conversions. The study of meteorology was born when these oscillations were explained as manifestations of changes in atmospheric pressure.Conversion Table: Torr to mmHg torr (Torr)įrequently Asked Questions About Torr to mmHg Small variations in height that happened in barometers were familiar to scientists at the time. He is recognized as the first to explain atmospheric pressure in a modern way. When Torricelli presented the first mercury barometer to the wider population, he drew interest. It was named torr in honor of Evangelista Torricelli, an Italian mathematician and physicist who established the barometer principle in 1644. The torr (symbol: Torr) is a pressure unit defined as exactly 1/760 of a familiar atmosphere on an absolute scale (101325 Pa). Furthermore, mmHg and torr are almost the same units. What is a Torr Unit?īecause the early barometers were made of mercury (Hg) inside a vertical glass, the natural pressure unit was mmHg (or mm Hg), which stands for a millimetre of mercury.
Also, try Volume Conversion tool for conversion between different volume units, or maybe convert Grams to Calories. In torr, what is the atmospheric pressure? How many torrs equal one atm? How much is 750 torr to atm, or maybe 720 torr to atm? Is there any pressure conversion table that would make our lives easier? If you’ve ever wondered about one of these topics, you’ve come to the correct place!Ĭheck our other conversion tools, such as Knots to mph, Time Unit Converter to convert between different units of time. The article includes a definition of the torr unit and correlations between torr and atm (unit of pressure). This is the Torr to Atm Conversion tool for converting torrs to atms (standard atmospheres).