In physics, the term total pressure may indicate two different quantities, both having the dimensions of a pressure:

where ρ is the density of the fluid, g is the local acceleration due to gravity, and z is the height above a datum.
If the variation in height above the datum is zero, or so small it can be ignored, the above equation reduces to the following simplified form:
Because this is the static pressure that occurs in locations where the fluid flow is entirely stopped (stagnated), this case is also called the stagnation pressure.

This article uses material from the Wikipedia article Total pressure, which is released under the Creative Commons Attribution-Share-Alike License 3.0.