# 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**

Psi (pound-force per square inch) | Inch of Water (inH2O) |

1 psi | 27.6799 inH2O |

2 psi | 55.3598 inH2O |

5 psi | 138.3995 inH2O |

10 psi | 276.799 inH2O |

20 psi | 553.598 inH2O |

50 psi | 1383.995 inH2O |

100 psi | 2767.99 inH2O |

**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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