Water Pressure Calculator
Calculate water static pressure from height and density, in kPa, bar, and psi.
How to Use the Water Pressure Calculator
- Enter the water column height in metres.
- Enter the fluid density (default 1000 kg/m³ for fresh water).
- Click Calculate for pressure in kPa, bar, and psi.
Use Cases
- •Tank and header sizing.
- •Pump pressure head calculation.
- •Gravity-fed irrigation design.
- •Plumbing system design.
Formula
P = ρ × g × h, where ρ is density (kg/m³), g = 9.81 m/s², h is height (m).
Frequently Asked Questions
What is static pressure?
Static pressure is the pressure exerted by a stationary fluid column due to gravity.
What density should I use?
Fresh water: 1000 kg/m³. Seawater: 1025 kg/m³. Hot water (80°C): 972 kg/m³.
What is typical household water pressure?
Typical supply pressure is 200–500 kPa (2–5 bar, 29–73 psi).