Pressure Conversion
PSI, head feet, inches of water column, kPa, bar.
Example
You enter
- Value 1
- From atm
- To psi
You get
- Value 14.6959
Checked against published worked examples from: NIST.
Details, formula, and sources
Formula or tableBidirectional conversion between psi, ft of water head, in WC, kPa, and bar. 1 psi = 2.31 ft H2O at 60 °F.
Source and editionNIST SP 811 unit factors; physical fact.
Free accessFree at nist.gov.
What governsEstimate. AHJ and licensed plumber / gas fitter govern. Verify against the IPC / IFGC edition adopted in your jurisdiction.
API field namesvalue, from, to
- Reference temperature for water-column conversions 60 °Fengineering convention