1. What is Inches of Water to PSI Calculator?

Definition: This calculator converts pressure measurements from inches of water column to pounds per square inch (psi).

Purpose: It helps engineers, HVAC technicians, and fluid system designers convert between these common pressure units.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{psi} \) — Pressure in pounds per square inch
• \( h_{in} \) — Height of water column in inches
• 0.036127 — Conversion factor (psi per inch of water)

Explanation: The formula converts the static pressure exerted by a column of water to equivalent psi units.

3. Importance of Pressure Unit Conversion

Details: Accurate conversion is essential for system design, pressure calibration, and comparing measurements from different instruments.

4. Using the Calculator

Tips: Simply enter the inches of water value and the calculator will instantly provide the equivalent psi value.

5. Frequently Asked Questions (FAQ)

Q1: What is inches of water as a pressure unit?
A: It's the pressure exerted by a column of water 1 inch high at standard conditions (39.2°F, 1 atm).

Q2: Where is this conversion commonly used?
A: In HVAC systems, gas pressure measurement, and low-pressure fluid systems.

Q3: How accurate is the conversion factor?
A: The factor 0.036127 psi/in is accurate for pure water at standard conditions.

Q4: Can I convert psi back to inches of water?
A: Yes, by dividing psi by 0.036127 (or multiplying by 27.68).

Q5: Does temperature affect the conversion?
A: Yes, water density changes with temperature, but the standard factor assumes 39.2°F.