Torr (Tr) - Pressure Unit - Definition, Application, Conversions

What is a torr?

A torr is a unit of pressure measurement named after the Italian physicist Evangelista Torricelli, a pioneer in the study of atmospheric pressure. One torr is defined as 1/760 of an atmosphere (atm).

In most cases, the unit torr is considered equivalent to a millimetre column of mercury (mmHg), but there is a minimal difference between the two (less than 0.000015%).

The torr is not part of the SI system, but is used in some specialised applications.

Torr is a unit mainly used in the context of vacuum, rather than in industrial hoses. However, the working pressure of vacuum hoses must be precisely determined to prevent collapse under low pressure. Industrial hoses must be designed to operate in specific vacuum conditions.

When is a torr used to measure pressure?

Torr is used to measure pressure mainly in specialised applications such as:

• Vacuum testing - Torr is traditionally and widely used in vacuum testing, including physics and engineering. It is crucial in the semiconductor industry, research laboratories and wherever precise vacuum pressure measurements are required. 
• Medicine - Although mmHg is more commonly used in medicine, the torr can be used to measure blood pressure and other medical applications requiring precise measurements. 
• Meteorology - In meteorology, the torr can be used to measure atmospheric pressure, especially in older instruments and in some specialised applications. 
• Physics and chemistry - In laboratory research, torr is used to measure pressure in experiments with gases, vacuum and under controlled pressure conditions. 
• Aviation and aerospace - In aerospace research, torr is used in simulation and pressure measurements at altitude and space conditions.

How to measure pressure in torr?

To measure pressure in torr, you need the right measuring equipment, such as a manometer calibrated in this unit or another that can be easily converted to torr.

Here are the steps to take to measure pressure in torr:

1. Choose the right manometer - You can use a mercury manometer for the measurement, since 1 torr is almost equal to 1 mmHg, and these types of devices measure pressure directly in mmHg. An alternative is digital manometers, which often allow you to choose different units, including torr.
2. Identify the measuring point - Determine where you want to measure the pressure (e.g. atmospheric pressure, pressure in vacuum systems or in industrial systems).
3. Connect the manometer - Place the mercury manometer vertically and let the pressure act on the mercury column. With a digital manometer, you simply connect the device to the system.
4. Read the result - In a mercury manometer, the height of the mercury column will give you the result in mmHg, which is equal to the same value in torr. In turn, in a digital manometer, the display will show the pressure directly in Tr, if you have the option to select this unit.

If your device measures pressure in other pressure units, you can convert it to Tr using the appropriate pressure converters.

Torr pressure unit conversions

• 1 torr = 0,00133322 bar
• 1 torr = 133,322 Pa
• 1 torr = 1,33322 hPa
• 1 torr = 0,133322 kPa
• 1 torr = 0,000133322 MPa
• 1 torr = 0,00131579 atm
• 1 torr = 0,0193368 PSI
• 1 torr = 13,5951 mmH2O
• 1 torr = 0,53524 inH2O
• 1 torr = 1 mmHg
• 1 torr = 0,0393701 inHg
• 1 torr = 2,7845 PSF
• 1 torr = 0,00135951 at
  

1 torr (Tr) = 0,00133322 bar = 133,322 Pa = 1,33322 hPa = 0,133322 kPa = 0,000133322 MPa = 0,00131579 atm = 0,0193368 PSI = 13,5951 mmH2O = 0,53524 inH2O = 1 mmHg = 0,0393701 inHg = 2,7845 PSF = 0,00135951 at

torr to Bar pressure unit conversion

To convert pressure from torr (Tr) to Bar multiply the pressure in torr (Tr) by 0,00133322.

• 1 torr to bar? 1 torr is equal to 0,0013332 bar
• 2 torr to bar? 2 torr is equal to 0,0026664 bar
• 5 torr to bar? 5 torr is equal to 0,0066661 bar
• 10 torr to bar? 10 torr is equal to 0,0133322 bar
• 20 torr to bar? 20 torr is equal to 0,0266644 bar
• 50 torr to bar? 50 torr is equal to 0,066661 bar
• 100 torr to bar? 100 torr is equal to 0,133322 bar
• 200 torr to bar? 200 torr is equal to 0,266644 bar
• 500 torr to bar? 500 torr is equal to 0,66661 bar
• 1000 torr to bar? 1000 torr is equal to 1,33322 bar

torr to Pa - torr to Pascal pressure unit conversion

To convert pressure from torr (Tr) to Pascal (Pa) multiply the pressure in torr (Tr) by 133,322.

• 1 torr to Pa? 1 torr is equal to 133,322 Pa
• 2 torr to Pa? 2 torr is equal to 266,644 Pa
• 5 torr to Pa? 5 torr is equal to 666,61 Pa
• 10 torr to Pa? 10 torr is equal to 1333,22 Pa
• 20 torr to Pa? 20 torr is equal to 2666,44 Pa
• 40 torr to Pa? 40 torr is equal to 5332,88 Pa
• 50 torr to Pa? 50 torr is equal to 6666,1 Pa
• 100 torr to Pa? 100 torr is equal to 13332,2 Pa
• 200 torr to Pa? 200 torr is equal to 26664,4 Pa
• 500 torr to Pa? 500 torr is equal to 66661 Pa
• 760 torr to Pa? 760 torr is equal to 101324,72 Pa
• 1000 torr to Pa? 1000 torr is equal to 133322 Pa

torr to hPa - torr to Hectopascal pressure unit conversion

To convert pressure from torr (Tr) to Hectopascal (hPa) multiply the pressure in torr (Tr) by 1,33322.

• 1 torr to hPa? 1 torr is equal to 1,33322 hPa
• 2 torr to hPa? 2 torr is equal to 2,66644 hPa
• 5 torr to hPa? 5 torr is equal to 6,6661 hPa
• 10 torr to hPa? 10 torr is equal to 13,3322 hPa
• 20 torr to hPa? 20 torr is equal to 26,6644 hPa
• 50 torr to hPa? 50 torr is equal to 66,661 hPa
• 100 torr to hPa? 100 torr is equal to 133,322 hPa
• 200 torr to hPa? 200 torr is equal to 266,644 hPa
• 500 torr to hPa? 500 torr is equal to 666,61 hPa
• 1000 torr to hPa? 1000 torr is equal to 1333,22 hPa

torr to kPa - torr to Kilopascal pressure unit conversion

To convert pressure from torr (Tr) to Kilopascal (kPa) multiply the pressure in torr (Tr) by 0,133322.

• 1 torr to kPa? 1 torr is equal to 0,133322 kPa
• 2 torr to kPa? 2 torr is equal to 0,266644 kPa
• 5 torr to kPa? 5 torr is equal to 0,66661 kPa
• 10 torr to kPa? 10 torr is equal to 1,33322 kPa
• 20 torr to kPa? 20 torr is equal to 2,66644 kPa
• 40 torr to kPa? 40 torr is equal to 5,33288 kPa
• 50 torr to kPa? 50 torr is equal to 6,6661 kPa
• 100 torr to kPa? 100 torr is equal to 13,3322 kPa
• 200 torr to kPa? 200 torr is equal to 26,6644 kPa
• 500 torr to kPa? 500 torr is equal to 66,661 kPa
• 1000 torr to kPa? 1000 torr is equal to 133,322 kPa

torr to MPa - torr to Megapascal pressure unit conversion

To convert pressure from torr (Tr) to Megapascal (MPa) multiply the pressure in torr (Tr) by 0,000133322.

• 1 torr to MPa? 1 torr is equal to 0,0001333 MPa
• 2 torr to MPa? 2 torr is equal to 0,0002666 MPa
• 5 torr to MPa? 5 torr is equal to 0,0006666 MPa
• 10 torr to MPa? 10 torr is equal to 0,0013332 MPa
• 20 torr to MPa? 20 torr is equal to 0,0026664 MPa
• 50 torr to MPa? 50 torr is equal to 0,0066661 MPa
• 100 torr to MPa? 100 torr is equal to 0,0133322 MPa
• 200 torr to MPa? 200 torr is equal to 0,0266644 MPa
• 500 torr to MPa? 500 torr is equal to 0,066661 MPa
• 1000 torr to MPa? 1000 torr is equal to 0,133322 MPa
• 1000 torr to MPa? 1000 torr is equal to 0,133322 MPa

torr to atm - torr to Atmosphere pressure unit conversion

To convert pressure from torr (Tr) to Atmosphere (atm) multiply the pressure in torr (Tr) by 0,00131579.

• 1 torr to atm? 1 torr is equal to 0,001316 atm
• 2 torr to atm? 2 torr is equal to 0,002632 atm
• 5 torr to atm? 5 torr is equal to 0,006579 atm
• 10 torr to atm? 10 torr is equal to 0,013158 atm
• 20 torr to atm? 20 torr is equal to 0,026316 atm
• 50 torr to atm? 50 torr is equal to 0,06579 atm
• 100 torr to atm? 100 torr is equal to 0,131579 atm
• 200 torr to atm? 200 torr is equal to 0,263158 atm
• 250 torr to atm? 250 torr is equal to 0,328948 atm
• 300 torr to atm? 300 torr is equal to 0,394737 atm
• 340 torr to atm? 340 torr is equal to 0,447369 atm
• 380 torr to atm? 380 torr is equal to 0,5 atm
• 500 torr to atm? 500 torr is equal to 0,657895 atm
• 650 torr to atm? 650 torr is equal to 0,855264 atm
• 710 torr to atm? 710 torr is equal to 0,934211 atm
• 720 torr to atm? 720 torr is equal to 0,947369 atm
• 725 torr to atm? 725 torr is equal to 0,953948 atm
• 730 torr to atm? 730 torr is equal to 0,960527 atm
• 745 torr to atm? 745 torr is equal to 0,980264 atm
• 750 torr to atm? 750 torr is equal to 0,986843 atm
• 754 torr to atm? 754 torr is equal to 0,992106 atm
• 755 torr to atm? 755 torr is equal to 0,993421 atm
• 760 torr to atm? 760 torr is equal to 1 atm
• 765 torr to atm? 765 torr is equal to 1,006579 atm
• 780 torr to atm? 780 torr is equal to 1,026316 atm
• 800 torr to atm? 800 torr is equal to 1,052632 atm
• 850 torr to atm? 850 torr is equal to 1,118422 atm
• 912 torr to atm? 912 torr is equal to 1,2 atm
• 1000 torr to atm? 1000 torr is equal to 1,31579 atm

torr to PSI pressure unit conversion

To convert pressure from torr (Tr) to PSI multiply the pressure in torr (Tr) by 0,0193368.

• 1 torr to PSI? 1 torr is equal to 0,019337 PSI
• 2 torr to PSI? 2 torr is equal to 0,038674 PSI
• 5 torr to PSI? 5 torr is equal to 0,096684 PSI
• 10 torr to PSI? 10 torr is equal to 0,193368 PSI
• 20 torr to PSI? 20 torr is equal to 0,386736 PSI
• 50 torr to PSI? 50 torr is equal to 0,96684 PSI
• 100 torr to PSI? 100 torr is equal to 1,93368 PSI
• 200 torr to PSI? 200 torr is equal to 3,86736 PSI
• 500 torr to PSI? 500 torr is equal to 9,6684 PSI
• 755 torr to PSI? 755 torr is equal to 14,599284 PSI
• 760 torr to PSI? 760 torr is equal to 14,695968 PSI
• 1000 torr to PSI? 1000 torr is equal to 19,3368 PSI

torr to mmH2O - torr to Milimetre of water column pressure unit conversion

To convert pressure from torr (Tr) to Milimetre of water column (mmH2O) multiply the pressure in torr (Tr) by 13,5951.

• 1 torr to mmH2O? 1 torr is equal to 13,5951 mmH2O
• 2 torr to mmH2O? 2 torr is equal to 27,1902 mmH2O
• 5 torr to mmH2O? 5 torr is equal to 67,9755 mmH2O
• 10 torr to mmH2O? 10 torr is equal to 135,951 mmH2O
• 20 torr to mmH2O? 20 torr is equal to 271,902 mmH2O
• 50 torr to mmH2O? 50 torr is equal to 679,755 mmH2O
• 100 torr to mmH2O? 100 torr is equal to 1359,51 mmH2O
• 200 torr to mmH2O? 200 torr is equal to 2719,02 mmH2O
• 500 torr to mmH2O? 500 torr is equal to 6797,55 mmH2O
• 1000 torr to mmH2O? 1000 torr is equal to 13595,1 mmH2O

torr to inH2O - torr to Inch of water column pressure unit conversion

To convert pressure from torr (Tr) to Inch of water column (inH2O) multiply the pressure in torr (Tr) by 0,53524.

• 1 torr to inH2O? 1 torr is equal to 0,53524 inH2O
• 2 torr to inH2O? 2 torr is equal to 1,07048 inH2O
• 5 torr to inH2O? 5 torr is equal to 2,6762 inH2O
• 10 torr to inH2O? 10 torr is equal to 5,3524 inH2O
• 20 torr to inH2O? 20 torr is equal to 10,7048 inH2O
• 50 torr to inH2O? 50 torr is equal to 26,762 inH2O
• 100 torr to inH2O? 100 torr is equal to 53,524 inH2O
• 200 torr to inH2O? 200 torr is equal to 107,048 inH2O
• 500 torr to inH2O? 500 torr is equal to 267,62 inH2O
• 1000 torr to inH2O? 1000 torr is equal to 535,24 inH2O

torr to mmHg - torr to Milimetre of mercury column pressure unit conversion

To convert pressure from torr (Tr) to Milimetre of mercury column (mmHg) multiply the pressure in torr (Tr) by 1.

• 1 torr to mmHg? 1 torr is equal to 1 mmHg
• 2 torr to mmHg? 2 torr is equal to 2 mmHg
• 5 torr to mmHg? 5 torr is equal to 5 mmHg
• 10 torr to mmHg? 10 torr is equal to 10 mmHg
• 20 torr to mmHg? 20 torr is equal to 20 mmHg
• 50 torr to mmHg? 50 torr is equal to 50 mmHg
• 100 torr to mmHg? 100 torr is equal to 100 mmHg
• 200 torr to mmHg? 200 torr is equal to 200 mmHg
• 340 torr to mmHg? 340 torr is equal to 340 mmHg
• 500 torr to mmHg? 500 torr is equal to 500 mmHg
• 720 torr to mmHg? 720 torr is equal to 720 mmHg
• 1000 torr to mmHg? 1000 torr is equal to 1000 mmHg

torr to inHg - torr to Inch of mercury column pressure unit conversion

To convert pressure from torr (Tr) to Inch of mercury column (inHg) multiply the pressure in torr (Tr) by 0,0393701.

• 1 torr to inHg? 1 torr is equal to 0,03937 inHg
• 2 torr to inHg? 2 torr is equal to 0,07874 inHg
• 5 torr to inHg? 5 torr is equal to 0,196851 inHg
• 10 torr to inHg? 10 torr is equal to 0,393701 inHg
• 20 torr to inHg? 20 torr is equal to 0,787402 inHg
• 50 torr to inHg? 50 torr is equal to 1,968505 inHg
• 100 torr to inHg? 100 torr is equal to 3,93701 inHg
• 200 torr to inHg? 200 torr is equal to 7,87402 inHg
• 500 torr to inHg? 500 torr is equal to 19,68505 inHg
• 1000 torr to inHg? 1000 torr is equal to 39,3701 inHg

torr to PSF pressure unit conversion

To convert pressure from torr (Tr) to PSF multiply the pressure in torr (Tr) by 2,7845.

• 1 torr to PSF? 1 torr is equal to 2,7845 PSF
• 2 torr to PSF? 2 torr is equal to 5,569 PSF
• 5 torr to PSF? 5 torr is equal to 13,9225 PSF
• 10 torr to PSF? 10 torr is equal to 27,845 PSF
• 20 torr to PSF? 20 torr is equal to 55,69 PSF
• 50 torr to PSF? 50 torr is equal to 139,225 PSF
• 100 torr to PSF? 100 torr is equal to 278,45 PSF
• 200 torr to PSF? 200 torr is equal to 556,9 PSF
• 500 torr to PSF? 500 torr is equal to 1392,25 PSF
• 1000 torr to PSF? 1000 torr is equal to 2784,5 PSF

torr to at - torr to Technical atmosphere pressure unit conversion

To convert pressure from torr (Tr) to Technical Atmosphere (at) multiply the pressure in torr (Tr) by 0,00135951.

• 1 torr to at? 1 torr is equal to 0,00136 at
• 2 torr to at? 2 torr is equal to 0,002719 at
• 5 torr to at? 5 torr is equal to 0,006798 at
• 10 torr to at? 10 torr is equal to 0,013595 at
• 20 torr to at? 20 torr is equal to 0,02719 at
• 50 torr to at? 50 torr is equal to 0,067976 at
• 100 torr to at? 100 torr is equal to 0,135951 at
• 200 torr to at? 200 torr is equal to 0,271902 at
• 500 torr to at? 500 torr is equal to 0,679755 at
• 1000 torr to at? 1000 torr is equal to 1,35951 at