Water Hammer Calculator
Estimate pressure surge from sudden valve closure using Joukowsky's equation.
How to Use the Water Hammer Calculator
- Enter the initial flow velocity in m/s.
- Enter the pipe length in metres.
- Enter pressure wave speed (typically 1200 m/s for steel).
- Review pressure surge and critical closing time.
Use Cases
- •Pipeline surge protection
- •Valve closure analysis
- •Pump trip assessment
Formula
ΔP = ρ × a × ΔV
Frequently Asked Questions
How accurate is this calculator?
Results are based on standard engineering formulas and are suitable for preliminary estimates.
What units are used?
SI units (metres, kg, kPa) are used unless otherwise noted.
Is it free?
Yes, all calculators are completely free.