Enter the enthalpy (J) and the velocity (m/s) into the calculator to determine the Stagnation Enthalpy. 

Stagnation Enthalpy Formula

The following formula is used to calculate the Stagnation Enthalpy. 

Hstag = H + V^2/2
  • Where Hstag is the Stagnation Enthalpy (J)
  • H is the enthalpy (J) 
  • V is the velocity (m/s) 

To calculate the stagnation enthalpy, square the velocity, divide by 2, then add in the enthalpy.

How to Calculate Stagnation Enthalpy?

The following two example problems outline how to calculate the Stagnation Enthalpy.

Example Problem #1:

  1. First, determine the enthalpy (J). In this example, the enthalpy (J) is given as 50.
  2. Next, determine the velocity (m/s). For this problem, the velocity (m/s) is given as 2.5.
  3. Finally, calculate the Stagnation Enthalpy using the equation above: 

Hstag = H + V^2/2

Inserting the values from above and solving the equation: 

Hstag =50 + 2.5^2/2 = 53.125 (J)

Example Problem #2: 

Using the same process as above, first define the variables required by the formula. In this case, these values are provided as the following:

enthalpy (J) = 30

velocity (m/s) = 3

Entering these values gives:

Hstag = 30 + 3^2/2 = 34.5 (J)