This shot article discuss how to calculate the velocity head for a fluid. The equations used below are mainly used in many calculations to obtain the velocity head for a fluid.

**What is Velocity head?**

In general it is the pressure required or energy needed to rise the speed of a flowing fluid. So any static pressure needed to produce a velocity of fluid is also defined as velocity head.

The velocity head is often expressed in length measurement and represents the kinetic energy change of the fluid flowing. In terms of pumps the velocity head can be defined as the amount of head or energy needed to maintain a required velocity in suction and discharge lines.

**How to calculate the velocity head for a fluid?**

The velocity head can be expressed in the flowing equation:

Where;

𝛥h is the head loss of flowing fluid in (ft) or (m)

u is velocity of flowing fluid in (ft/s) or (m/s)

𝚐 is the gravitational acceleration constant (32.2 ft/s^{2}) or (9.81 m/s^{2})

**References**

Carl R. Branan, Rules of Thumb for Chemical Engineers, 4^{th} Edition, Elsevier inc.