# Critical Flow Calculator

Flow can be defined as the amount of fluid that passes through a surface at a certain point of time. The ratio of the inertial force to the gravitational force representing the different flow on a free surface is the froude number. If the froude number is less then 1, it is subcritical, greater than 1 it is supercritical and when equal to 1, it is critical. This calculator is used to find the state of flow based on the froude number with gravity, velocity and depth.

## Find Critical, Subcritical or Supercritical Flow

Flow can be defined as the amount of fluid that passes through a surface at a certain point of time. The ratio of the inertial force to the gravitational force representing the different flow on a free surface is the froude number. If the froude number is less then 1, it is subcritical, greater than 1 it is supercritical and when equal to 1, it is critical. This calculator is used to find the state of flow based on the froude number with gravity, velocity and depth.

Code to add this calci to your website

#### Formula:

F = u / (√ ( g * h ) )
**Where,**
F = Froude Number
u = Velocity of the Flow
g = Acceleration of Gravity
h = Depth of Flow Relative to the Channel Bottom
William Froude derived the froude number who gave the speed-length ratio and hence froude number is based on ratio.