1. What is Water Pressure?

Water pressure is the force exerted by water per unit area, calculated using the formula P = ρ × g × h, where ρ is density, g is gravitational acceleration, and h is height of the water column.

2. How Does the Calculator Work?

The calculator uses the water pressure equation:

Where:

• \( P \) — Water pressure (Pascals)
• \( \rho \) — Density of water (typically 1000 kg/m³)
• \( g \) — Gravitational acceleration (9.81 m/s² on Earth)
• \( h \) — Height of water column (meters)

Explanation: The pressure at any point in a fluid at rest depends on the depth, density of the fluid, and the acceleration due to gravity.

3. Importance of Water Pressure Calculation

Details: Understanding water pressure is crucial for designing hydraulic systems, plumbing, dams, and understanding natural phenomena like ocean pressure at different depths.

4. Using the Calculator

Tips: Enter density in kg/m³ (1000 for water), gravity in m/s² (9.81 on Earth), and height in meters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What are typical units for water pressure?
A: Pascals (Pa) are the SI unit, but kilopascals (kPa), bars, or psi (pounds per square inch) are also commonly used.

Q2: How does water pressure change with depth?
A: Pressure increases linearly with depth - every 10 meters of water depth increases pressure by about 98.1 kPa.

Q3: Does this formula work for other liquids?
A: Yes, but you must use the correct density (ρ) for the specific liquid.

Q4: What is atmospheric pressure's role?
A: This formula calculates gauge pressure. For absolute pressure, add atmospheric pressure (101.325 kPa at sea level).

Q5: How does gravity affect water pressure?
A: On planets with different gravity, water pressure would change proportionally to the gravitational acceleration.