Psi to Inch of Water (inH2O) Pressure Unit Conversion Calculator

This calculator allows you to convert pressure values from pounds per square inch (psi) to inches of water (inH2O).

Definition: Pound-force per Square Inch (psi)

A pound-force per square inch (symbol: psi) is a unit of pressure used in the imperial and US customary systems. It represents the pressure resulting from a force of one pound-force applied over an area of one square inch.

Definition: Inch of Water (inH2O)

An inch of water (symbol: inH2O) is a unit of pressure that represents the pressure exerted by a column of water one inch high at 39.2°F under standard gravity. It is commonly used in HVAC and other industrial applications to measure differential pressure.

Formula for Psi to Inch of Water (inH2O) Conversion:

Pressure in inH2O = Pressure in psi × 27.6799

How to Convert Psi to Inch of Water: Example Calculation

Suppose you have a pressure of 5 psi. 

To convert it to inH2O: 5 × 27.6799 = 138.3995 inH2O 

So, 5 psi is equal to 138.3995 inH2O.

Quick Reference Conversion Table for Psi to Inch of Water

Use of Psi to Inch of Water Conversion Calculator:

• HVAC Systems: Convert pressures in psi to inH2O for accurate measurement in ductwork and other HVAC systems.
• Instrumentation: Ideal for converting gauge readings from imperial units to metric units in water-based systems.
• Industrial Applications: Essential for various industries requiring pressure conversions between these units.

This calculator is a practical tool for engineers, technicians, and professionals working in fields that demand precise pressure conversions.

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