1. What is Water Pressure at Tank Bottom?

Water pressure at the bottom of a tank is the force per unit area exerted by the water column above that point. It increases linearly with depth due to the weight of the water above.

2. How Does the Calculator Work?

The calculator uses the hydrostatic pressure formula:

Where:

• \( P \) — Pressure at bottom (Pascals)
• \( \rho \) — Fluid density (kg/m³)
• \( g \) — Gravitational acceleration (m/s²)
• \( h \) — Depth of water (meters)

Explanation: The pressure increases directly with depth and density, following the principles of hydrostatics where pressure depends only on the height of the fluid column above.

3. Importance of Pressure Calculation

Details: Calculating bottom pressure is crucial for tank design, structural integrity assessment, pump selection, and ensuring safety in fluid storage systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why does pressure increase with depth?
A: Pressure increases with depth because the weight of the fluid above increases, exerting more force on the bottom surface.

Q2: Does tank shape affect bottom pressure?
A: No, hydrostatic pressure depends only on depth, not on the shape or volume of the container.

Q3: What are typical pressure values for water tanks?
A: For a 10-meter water column, pressure is approximately 98,100 Pa (about 0.97 atm or 14.2 psi).

Q4: How does fluid density affect pressure?
A: Denser fluids exert higher pressure at the same depth. For example, seawater (ρ≈1025 kg/m³) exerts about 2.5% more pressure than freshwater.

Q5: Can this formula be used for other fluids?
A: Yes, the formula works for any incompressible fluid by using the appropriate density value for that fluid.