Inches Water to PSI Calculator

Pressure Conversion Formula:

\[ P_{psi} = h_{in} \times 0.0361 \]

Pressure (psi):

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1. What is an Inches Water to PSI Calculator?

Definition: This calculator converts water column height in inches to pressure in 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:

\[ P_{psi} = h_{in} \times 0.0361 \]

Where:

\( P_{psi} \) — Pressure in pounds per square inch
\( h_{in} \) — Height of water column in inches
0.0361 — Conversion factor (psi per inch of water)

Explanation: The height of water column is multiplied by the standard conversion factor to get equivalent pressure in psi.

3. Importance of Pressure Conversion

Details: Accurate pressure conversion is essential for system design, calibration, and troubleshooting in various engineering applications.

4. Using the Calculator

Tips: Simply enter the water column height in inches. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 0.0361?
A: This factor comes from the density of water at standard conditions (1 inch water column = 0.0361 psi at 4°C).

Q2: When is this conversion typically used?
A: Common in HVAC systems, pneumatic controls, and low-pressure fluid systems where inches of water is a convenient unit.

Q3: Does temperature affect the conversion?
A: Slightly - water density changes with temperature, but for most practical applications the standard factor is sufficient.

Q4: How accurate is this conversion?
A: For engineering purposes, it's accurate to within about 0.5% under normal conditions.

Q5: Can I convert PSI back to inches water?
A: Yes, by dividing psi by 0.0361 (or multiplying by 27.68).