PSI to Inches of Water Converter
Unit ConversionConvert pounds per square inch (psi) to inches of water column (inH2O), a low-pressure unit common in HVAC and gas measurement.
Inches of Water
Equivalent pressure in inches of water column, using the 60°F reference standard
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Odeh Ahwal0people find this calculator helpful
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Frequently Asked Questions
What is inches of water column used for?
Inches of water column is a low-pressure unit widely used in HVAC ductwork, natural gas line pressure, and other low-pressure applications where psi would be an inconveniently small number.
Why does the reference temperature matter?
The density of water changes slightly with temperature, so the exact conversion factor depends on a reference temperature. This calculator uses the 60°F (15.56°C) reference commonly used in US engineering practice, giving 27.7076 inH2O per psi.
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