How to Use This Calculator
- Enter the fluid head in meters (h). This is the vertical distance from the fluid surface to the point where pressure is being measured.
- Specify the fluid density (ρ) in kg/m³. The default value is 1000 kg/m³ for water at 4°C. Use different values for other fluids.
- Enter the acceleration due to gravity (g) in m/s². The default value is 9.81 m/s² (standard gravity).
- Click the "Calculate" button to compute the pressure.
- The results will be displayed in Pascal (Pa), Kilopascal (kPa), and Bar.
Principle of Calculation
The calculator uses the hydrostatic pressure formula: P = ρ × g × h, where:
- P = Pressure
- ρ = Fluid density
- g = Acceleration due to gravity
- h = Fluid head
This formula shows that pressure increases linearly with depth (head) in a fluid column. For example, water exerts approximately 9.81 kPa of pressure for every meter of depth.
Applications
This calculator is useful in various engineering fields including:
- Hydraulic systems design
- Water treatment facilities
- Pipeline systems
- Open-channel flow analysis
- Pressure vessel design
Example
If you want to calculate the pressure at the bottom of a 10-meter deep water tank:
- Enter 10 for head
- Use the default value for fluid density (1000 kg/m³)
- Use the default value for gravity (9.81 m/s²)
- Calculate to get approximately 98.1 kPa of pressure