Pressure Converter
Convert between pascals, bar, PSI, atmospheres, torr and mmHg.
About this calculator
Pressure units vary by application, tyre pressure is usually quoted in PSI or bar, weather reports use hectopascals or mmHg, and scientific work uses pascals or atmospheres, so a reading from one gauge or source often needs converting before it's useful elsewhere. This calculator converts a pressure value between pascals, kilopascals, bar, PSI, standard atmospheres, torr and mmHg by routing through a common base unit of pascals, giving an exact result for any pair using precisely defined conversion factors rather than rounded approximations. It's useful for checking tyre pressure specs given in an unfamiliar unit, converting a weather barometric reading, or working through engineering and chemistry problems that mix pressure unit systems.
Worked example
1 bar to PSI
Result: 14.5 psi
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