1. What is SG to PSI Calculation?

Definition: This calculator converts specific gravity (SG) and height of fluid column to pressure in pounds per square inch (psi).

Purpose: It helps engineers and technicians determine the pressure exerted by a column of fluid based on its specific gravity and height.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Pressure (psi)
• \( SG \) — Specific Gravity (dimensionless)
• \( h \) — Height of fluid column (feet)
• \( 0.433 \) — Conversion factor (psi per foot of water)

Explanation: The formula calculates the hydrostatic pressure at the base of a fluid column by multiplying the specific gravity, height, and a constant that converts feet of water to psi.

3. Importance of SG to PSI Calculation

Details: This calculation is essential for designing and analyzing hydraulic systems, pressure vessels, and fluid storage tanks.

4. Using the Calculator

Tips: Enter the specific gravity of your fluid (1.0 for water) and the height of the fluid column in feet. Both 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 g/cm³ or 62.4 lb/ft³).

Q2: Why is 0.433 used in the formula?
A: This constant converts feet of water column to psi (1 foot of water = 0.433 psi).

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

Q4: What's the pressure for water (SG=1) at 10 feet?
A: 1 × 10 × 0.433 = 4.33 psi.

Q5: How does temperature affect this calculation?
A: Temperature affects fluid density, so use the SG value at your operating temperature.