Calculate Pressure with Specific Gravity

Pressure Formula:

\[ P = \rho \times g \times h \]

Pressure (Pascals):

1. What is Pressure Calculation with Specific Gravity?

Definition: This calculator determines the hydrostatic pressure at a certain depth for a fluid with a given specific gravity.

Purpose: It helps engineers and scientists calculate pressure in various applications like hydraulic systems, underwater structures, and fluid mechanics.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ P = \rho \times g \times h \]

Where:

\( P \) — Pressure (Pascals, Pa)
\( \rho \) — Density (kg/m³) = Specific Gravity × 1000 kg/m³
\( g \) — Gravity (9.81 m/s²)
\( h \) — Height/Depth (meters, m)

Explanation: The specific gravity is multiplied by water density (1000 kg/m³) to get actual density, then multiplied by gravity and depth to calculate pressure.

3. Importance of Pressure Calculation

Details: Accurate pressure calculations are essential for designing containers, pipes, dams, and underwater equipment to ensure structural integrity and safety.

4. Using the Calculator

Tips: Enter the specific gravity of the fluid (relative to water) and the depth/height in meters. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is specific gravity?
A: Specific gravity is the ratio of a substance's density to the density of water (1000 kg/m³ at 4°C).

Q2: Why use specific gravity instead of density?
A: Specific gravity is dimensionless and easier to work with for many applications, as it compares directly to water.

Q3: What's the typical specific gravity of common fluids?
A: Water = 1.0, Seawater ≈ 1.03, Gasoline ≈ 0.7, Mercury ≈ 13.6.

Q4: Can I use this for gases?
A: Only for gases with significant density, as the formula assumes constant density with depth (valid for liquids).

Q5: How do I convert Pascals to other units?
A: 1 kPa = 1000 Pa, 1 bar ≈ 100,000 Pa, 1 psi ≈ 6895 Pa.