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 with depth due to the weight of the water above.

2. How Does the Calculator Work?

The calculator uses the hydrostatic pressure formula:

Where:

• \( P_g \) — Water pressure at bottom (Pascals)
• \( \rho \) — Density of water (kg/m³)
• \( g \) — Acceleration due to gravity (m/s²)
• \( h \) — Height of water column (m)

Explanation: The pressure increases linearly with depth and depends on the density of the fluid and gravitational acceleration.

3. Importance of Water Pressure Calculation

Details: Calculating water pressure is crucial for designing water storage tanks, plumbing systems, dams, and underwater structures to ensure they can withstand the forces involved.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Does the shape of the tank affect the pressure?
A: No, hydrostatic pressure depends only on depth, not on the shape or volume of the container.

Q2: What is the typical density of water?
A: Pure water has a density of approximately 1000 kg/m³ at 4°C. Saltwater is denser at about 1025 kg/m³.

Q3: How does temperature affect water pressure calculations?
A: Temperature affects water density. Warmer water is less dense, which slightly reduces pressure at the same depth.

Q4: What units are used for pressure measurement?
A: Pascals (Pa) are the SI unit. 1 kPa = 1000 Pa, and 1 bar = 100,000 Pa ≈ atmospheric pressure at sea level.

Q5: Does atmospheric pressure affect the calculation?
A: This formula calculates gauge pressure (pressure above atmospheric). For absolute pressure, add atmospheric pressure (≈101,325 Pa at sea level).