Pressure Conversion

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

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Formula and source

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.

Audience

This tile is built for plumbers and the adjacent professions in the Plumbing and Gas group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.

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Posture

Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.