This head loss calculator can compute any of the six elements of the Darcy Weisbach equation from pipe head loss, friction to fluid velocity. There is in depth information about the formula below the form.

## How does this head loss calculator work?

This is a useful tool for all those interested to calculate pipe head loss or any of the other five elements in the Darcy-Weisbach equation such as pipe friction, pipe characteristics or fluid velocity. The form is very simple to use and comprises of 6 fields from which you need to complete 5 in order to retrieve the answer to the sixth variable.Most fields have measurement units you can choose from for you convenience. The answer offered by the head loss calculator, offers both the English and metric units so you can be sure to quickly get an idea of the result.

## The Darcy-Weisbach equation

This is a formula used to analyze the factors that influence the flow of fluid through a pipe and the overall head loss. It takes account of the length and diameter of the pipe, the friction coefficient, fluid velocity and the acceleration caused by gravity. The head loss due to pipe friction is defined as the resistance measured in feet or m head of the fluid. This is the standard equation used in hydraulic engineering and is mainly used for calculating pipe friction loss.

Metric measurement:

Head loss (m) = [Friction factor x Pipe length (m) x Fluid velocity (m/s)]/ [2 x Pipe diameter (m) x gravity acceleration (m/s^{2})]

English measurement:

Head loss (ft) = [Friction factor x Pipe length (ft) x Fluid velocity (ft/s)]/ [2 x Pipe diameter (ft) x gravity acceleration (ft/s^{2})]