1. What is a Feet of Head to PSI Calculator?

Definition: This calculator converts the height of a water column (in feet) to pressure in pounds per square inch (psi).

Purpose: It helps engineers, plumbers, and technicians in hydraulic systems to quickly convert between these common pressure measurements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Pressure in pounds per square inch (psi)
• \( h \) — Height of water column in feet (ft)
• 0.433 — Conversion factor (psi per foot of water)

Explanation: The formula accounts for the weight of water, where 1 foot of water height exerts 0.433 psi of pressure at its base.

3. Importance of Pressure Conversion

Details: Accurate conversion between these units is essential for designing water systems, calculating pump requirements, and ensuring proper system operation.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 0.433?
A: This comes from the specific weight of water (62.4 lb/ft³) divided by 144 (in²/ft²), resulting in 0.433 psi per foot of water.

Q2: Does this work for other liquids?
A: No, this is specific to water at standard conditions. For other liquids, multiply by their specific gravity.

Q3: Is temperature considered in this calculation?
A: The 0.433 factor assumes water at 60°F. For very precise calculations at different temperatures, adjustments may be needed.

Q4: How accurate is this conversion?
A: For most practical purposes, it's sufficiently accurate. The actual value varies slightly with temperature and purity.

Q5: What's the reverse calculation (psi to feet)?
A: Divide psi by 0.433 to get feet of head (h = P / 0.433).