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Engineering Toolbox/Pressure Unit Converter

Pressure, Level & Process

Pressure Unit Converter

Convert pressure values commonly encountered in instrumentation, calibration, process operations and well testing through an SI pascal basis.

Converter

Unit conversion only — pressure datum is not changed.

Field use

Common pressure units in one place.

Useful for pressure gauges, transmitters, test equipment, controller ranges, hydrostatic references and well-test reporting.

Important distinction

Gauge, absolute and differential pressure are different references. This calculator converts units only. For example, 10 barg can be converted to psi gauge, but it must not be treated as 10 bar absolute without atmospheric-pressure correction.

Water-column and mercury-column entries use the conventional pressure-unit definitions. Conversion factors follow the NIST Guide to the SI (SP 811) basis where applicable.

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