1. What is a Head to PSI Calculator?

Definition: This calculator converts head height in feet to pressure in psi (pounds per square inch) using the fluid's specific gravity.

Purpose: It helps engineers and technicians determine the pressure at the base of a fluid column for hydraulic systems, plumbing, and other fluid mechanics applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{psi} \) — Pressure (pounds per square inch)
• \( h_{ft} \) — Head height (feet)
• \( SG \) — Specific gravity of fluid (dimensionless)
• 0.433 — Conversion factor (psi per foot of water)

Explanation: The head height is multiplied by the specific gravity (relative density) and the conversion factor to get pressure in psi.

3. Importance of Head to PSI Conversion

Details: This conversion is essential for designing and troubleshooting hydraulic systems, water supply systems, and any application where fluid pressure needs to be calculated from vertical height.

4. Using the Calculator

Tips: Enter the head height in feet and specific gravity of the fluid (default 1.0 for water). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is specific gravity?
A: Specific gravity is the ratio of a fluid's density to the density of water (1.0). For example, mercury has SG ≈ 13.6.

Q2: Where does the 0.433 factor come from?
A: It's the pressure in psi created by 1 foot of water (0.433 psi/ft).

Q3: Does this work for any fluid?
A: Yes, as long as you know the fluid's specific gravity relative to water.

Q4: How accurate is this calculation?
A: It's theoretically accurate for static fluids at standard conditions. Temperature and dynamic effects may require adjustments.

Q5: Can I use this for gas pressure?
A: No, this is only for liquids. Gas pressure calculations require different approaches.