Enter the friction factor, length of pipe, the inner diameter of the pipe, and the velocity of flow into the calculator to determine the friction head loss.

- Friction Factor Calculator
- Coefficient of Friction Calculator
- Reynolds Number Calculator
- Pipe Flow Calculator
- GPM to Pipe Size Calculator

## Pipe Friction Loss Formula

The following formula is used to calculate the head loss due to friction of flow through a pipe.

hf = f (L/D) * (v^2/2g)

- Where hf is the head loss (m)
- f is the friction factor
- L is the length of pipe (m)
- D is the inner diameter of the pipe (m)
- v is the flow velocity (m/s)
- g is the acceleration due to gravity (m/s^2)

Units of feet can be substituted for meters assuming the proper conversions are done.

## Pipe Friction Loss Definition

A pipe friction loss is defined as the total loss of energy, typically as potential energy, that arises from friction forces of flow moving through a pipe.

## Pipe Friction Loss Example

How to calculate a pipe friction loss?

**First, determine the friction factor.**Calculate the friction factor between the pipe and the fluid flow.

**Next, determine the length and diameter.**Measure the length and inner diameter of the pipe.

**Next, determine the velocity of fluid.**Measure the fluid velocity moving through the pipe.

**Finally, calculate the pipe friction loss.**Calculate the pipe friction loss using the equation above.

## FAQ

**What is friction loss?**

Friction loss is the loss of kinetic or potential energy of a system to the forces of friction resisting flow.