Pressure Conversion

PSI, head feet, inches of water column, kPa, bar.

Example

You enter

You get

Details, formula, and sources

Bidirectional conversion between psi, ft of water head, in WC, kPa, and bar. 1 psi = 2.31 ft H2O at 60 °F.

NIST SP 811 unit factors; physical fact.

Free at nist.gov.

Estimate. AHJ and licensed plumber / gas fitter govern. Verify against the IPC / IFGC edition adopted in your jurisdiction.

Field names used by the API: value, from, to

Reference temperature for water-column conversions 60 °Fengineering convention

Details, formula, and sources

Bidirectional conversion between psi, ft of water head, in WC, kPa, and bar. 1 psi = 2.31 ft H2O at 60 °F.

NIST SP 811 unit factors; physical fact.

Free at nist.gov.

Estimate. AHJ and licensed plumber / gas fitter govern. Verify against the IPC / IFGC edition adopted in your jurisdiction.

Reference temperature for water-column conversions 60 °Fengineering convention