1. What is Water Pressure at Bottom of Tank?

Definition: This calculator determines the hydrostatic pressure at the bottom of a water tank based on water density, gravity, and tank height.

Purpose: It helps engineers, plumbers, and tank designers ensure proper structural integrity and safety of water storage systems.

2. How Does the Calculator Work?

The calculator uses the hydrostatic pressure formula:

Where:

• \( P \) — Water pressure at bottom (Pascals)
• \( \rho \) — Water density (kg/m³, default 1000)
• \( g \) — Gravitational acceleration (m/s², default 9.81)
• \( h \) — Height of water column (meters)

Explanation: The pressure increases linearly with depth due to the weight of the water above.

3. Importance of Water Pressure Calculation

Details: Accurate pressure calculations are crucial for designing tank walls, selecting appropriate materials, and ensuring safety valves are properly rated.

4. Using the Calculator

Tips: Enter water density (default 1000 kg/m³), gravity (default 9.81 m/s²), and tank height in meters. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is water density typically 1000 kg/m³?
A: This is the density of pure water at 4°C. It can vary slightly with temperature and impurities.

Q2: What if my tank contains other liquids?
A: Adjust the density value accordingly (e.g., 13600 kg/m³ for mercury, 789 kg/m³ for ethanol).

Q3: Does this account for atmospheric pressure?
A: No, this calculates only hydrostatic pressure. Total pressure would add atmospheric pressure (101325 Pa at sea level).

Q4: How does tank shape affect the pressure?
A: Hydrostatic pressure depends only on depth, not container shape. However, shape affects total force on walls.

Q5: What's a typical pressure for residential water tanks?
A: For a 3m tall tank: ~29,430 Pa (about 4.27 psi). Taller buildings need stronger pipes and tanks.