1. What is a Pressure Rho g h Calculator?

Definition: This calculator computes hydrostatic pressure using the formula P = ρ × g × h, where ρ is density, g is gravity, and h is height.

Purpose: It helps engineers, physicists, and students calculate pressure at depth in fluids for various applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Pressure (Pascals)
• \( \rho \) — Fluid density (kg/m³)
• \( g \) — Gravitational acceleration (9.81 m/s² on Earth)
• \( h \) — Height/depth of fluid column (meters)

Explanation: The pressure increases linearly with depth in a fluid due to the weight of the fluid above.

3. Importance of Pressure Calculation

Details: Accurate pressure calculations are essential for designing hydraulic systems, underwater structures, and understanding fluid behavior.

4. Using the Calculator

Tips: Enter the fluid density (default water is 1000 kg/m³), gravity (default 9.81 m/s²), and height/depth. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What units does this calculator use?
A: The calculator uses SI units: kg/m³ for density, m/s² for gravity, m for height, and outputs Pascals (Pa).

Q2: Can I use this for gases?
A: Yes, but only for static situations where density doesn't change significantly with height (valid for small height differences).

Q3: What's the value of g on other planets?
A: For example, Mars has g ≈ 3.71 m/s², Moon ≈ 1.62 m/s². Change the gravity value accordingly.

Q4: How does temperature affect the calculation?
A: Temperature affects fluid density (ρ). Use the appropriate density value for the fluid's temperature.

Q5: Does this include atmospheric pressure?
A: No, this calculates only the hydrostatic pressure. For total pressure, add atmospheric pressure (101325 Pa at sea level).