torr [Torr] Unit Converter
Definition of torr [Torr] unit
The torr is a unit of pressure equal to one millimetre of mercury, defined as exactly 1/760 of a standard atmosphere, or approximately 133.322 pascals. It is commonly used to express low pressures in vacuum systems.
History of torr [Torr] unit
The torr is named after Evangelista Torricelli, the Italian physicist who invented the mercury barometer in 1643 and demonstrated atmospheric pressure. For centuries, pressure was compared with the height of a mercury column, making the millimetre of mercury a practical measurement. In 1954, the name torr was adopted in honour of Torricelli. It was historically associated with one millimetre of mercury, but modern standards define it precisely as 1/760 of an atmosphere, distinguishing it from experimentally realized mmHg values in laboratory practice.
Applications of torr [Torr] unit
Today, torr is widely used for vacuum measurements in laboratories and industry. Vacuum pumps, gauges, and process specifications often report pressures in millitorr (mTorr), especially in semiconductor fabrication, vacuum coating, electron microscopy, and mass spectrometry. It also appears in physiology and medicine, including pressure descriptions for some respiratory and blood-gas applications.
Complete list of torr [Torr] unit conversion
- pascal [Pa] = 0.0075006168270417 torr [Torr]
- kilopascal [kPa] = 7.5006168270417 torr [Torr]
- bar = 750.06168270417 torr [Torr]
- psi [psi] = 51.714932571504 torr [Torr]
- ksi [ksi] = 51714.932571504 torr [Torr]
- Standard atmosphere [atm] = 760 torr [Torr]
- exapascal [EPa] = 7.5006168270417E+15 torr [Torr]
- petapascal [PPa] = 7500616827041.7 torr [Torr]
- terapascal [TPa] = 7500616827.0417 torr [Torr]
- gigapascal [GPa] = 7500616.8270417 torr [Torr]
- megapascal [MPa] = 7500.6168270417 torr [Torr]
- hectopascal [hPa] = 0.75006168270417 torr [Torr]
- dekapascal [daPa] = 0.075006168270417 torr [Torr]
- decipascal [dPa] = 0.00075006168270417 torr [Torr]
- centipascal [cPa] = 7.5006168270417E-5 torr [Torr]
- millipascal [mPa] = 7.5006168270417E-6 torr [Torr]
- micropascal [µPa] = 7.5006168270417E-9 torr [Torr]
- nanopascal [nPa] = 7.5006168270417E-12 torr [Torr]
- picopascal [pPa] = 7.5006168270417E-15 torr [Torr]
- femtopascal [fPa] = 7.5006168270417E-18 torr [Torr]
- attopascal [aPa] = 7.5006168270417E-21 torr [Torr]
- newton/square meter = 0.0075006168270417 torr [Torr]
- newton/square centimeter = 75.006168270417 torr [Torr]
- newton/square millimeter = 7500.6168270417 torr [Torr]
- kilonewton/square meter = 7.5006168270417 torr [Torr]
- millibar [mbar] = 0.75006168270417 torr [Torr]
- microbar [µbar] = 0.00075006168270417 torr [Torr]
- dyne/square centimeter = 0.00075006168270417 torr [Torr]
- kilogram-force/square meter = 0.073555924006908 torr [Torr]
- kilogram-force/sq. cm = 735.55924006908 torr [Torr]
- kilogram-force/sq. millimeter = 73555.924006908 torr [Torr]
- gram-force/sq. centimeter = 0.73555924006908 torr [Torr]
- ton-force (short)/sq. foot = 718.26295238209 torr [Torr]
- ton-force (short)/sq. inch = 103429.86514301 torr [Torr]
- ton-force (long)/square foot = 804.45450666787 torr [Torr]
- ton-force (long)/square inch = 115841.44896017 torr [Torr]
- kip-force/square inch = 51714.932571504 torr [Torr]
- pound-force/square foot = 0.35913147619102 torr [Torr]
- pound-force/square inch = 51.714932571504 torr [Torr]
- poundal/square foot = 0.011162147516535 torr [Torr]
- centimeter mercury (0°C) = 9.9999723661485 torr [Torr]
- millimeter mercury (0°C) = 0.99999723661485 torr [Torr]
- inch mercury (32°F) [inHg] = 25.400006316309 torr [Torr]
- inch mercury (60°F) [inHg] = 25.328457932396 torr [Torr]
- centimeter water (4°C) = 0.73555924006908 torr [Torr]
- millimeter water (4°C) = 0.073555924006908 torr [Torr]
- inch water (4°C) [inAq] = 1.8683204697755 torr [Torr]
- foot water (4°C) [ftAq] = 22.419845637306 torr [Torr]
- inch water (60°F) [inAq] = 1.8664534912411 torr [Torr]
- foot water (60°F) [ftAq] = 22.397441894893 torr [Torr]
- atmosphere technical [at] = 735.55924006908 torr [Torr]
