Technical Atmosphere is similar although not the same value as the Standard Atmosphere pressure unit (atm) and both have been used historically to relate a pressure value to multiples of atmospheric pressure. 1 Technical Atmosphere is defined as being exactly equal to 98,066.5 Pascals.
The at pressure unit can be occasionally found on water resistant watches to indicate the maximum depth rating, particularly on European brands. However the unit has been largely phased out and the average atmospheric pressure is now mostly defined as 1 atm (101325 Pa) for weather and aviation or more 1 bar (100,000 Pa) for industry and general purposes.
Technical Atmosphere is some times written as 'ata' which is the short way of writing 'at absolute'.
Equivalent values for 1 at in other pressure units can be found in the list below.
To convert any pressure unit into Technical Atmospheres click on the relevant unit below.
Use the pressure converter page to convert many different values to and from technical atmosphere units.
|10000||mmH2O 4°C (39.2°F)|
|1000||cmH2O 4°C (39.2°F)|
|10||mH2O 4°C (39.2°F)|
|393.701||inH2O 4°C (39.2°F)|
|32.8084||ftH2O 4°C (39.2°F)|
|735.559||mmHg 0°C (32°F)|
|73.5559||cmHg 0°C (32°F)|
|28.9590||inHg 0°C (32°F)|
|735559||µHg 0°C (32°F)|
|0.00634971||tsi (uk, long)|
|0.00711167||tsi (usa, short)|
|1.02408||tsf (usa, short)|
Please note that the conversion factors above are accurate to 6 significant figures.
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