# Formula Bernoulli equation Static pressure    Mass density    Height    Flow velocity ## Total pressure

Unit
Constant total pressure of a stationary, non-viscous, incompressible fluid or gas along a streamline. The total pressure here is the sum of the dynamic pressure $$\frac{1}{2} \rho \, v^2$$, hydrostatic pressure $$\rho \, g \, h$$ and the static pressure $$\mathit{\Pi}_{\text{st}}$$.

The Bernoulli equation results from the law of conservation of energy.

## Static pressure

Unit
Static pressure is the pressure that a body would feel if it were moving with the flow. The static pressure results from the potential energy of the flowing fluid.

## Mass density

Unit
Mass per volume of the fluid or gas.

## Height

Unit
Height of the considered streamline of a fluid or gas above the ground (or other specified zero point).

## Flow velocity

Unit
Flow velocity is the average velocity of the directed motion of the fluid or gas.

## Gravitational acceleration

Unit
On Earth, the gravitational acceleration is approximately $$g = 9.8 \, \frac{\mathrm{m}}{\mathrm{s}^2}$$.