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HYDRONICS CALCULATOR

Water velocity calculator

 
Water Flow Rate (gpm) gpm
Pipe diameter (inches) inches
V = ft/sec

Calculate

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Minimum pipe diameter calculator

 
Water Flow Rate (gpm) gpm
Water Velocity (ft/sec) ft/sec
D = inches

Calculate

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Water flow rate calculator

 
Pipe Diameter (inches) inches
Water Velocity (ft/sec) ft/sec
Q = gpm

Calculate

Reset

Notes:

  1. Fill out the green spaces only.
  2. This is a basic tool for quick reference purposes only, it is not intended to be used for hydronic systems design.
  3. ASHRAE 90.1 recommends water velocities between 4.4 and 12.4 ft/sec depending on operating hours per year and application. For more details, see table above.