Define the ambient temperature (in K):

Enter the wavelength of the R1 emission line (in nm), measured at ambient pressure and ambient temperature:

Enter the wavelength of the [shifted] R1 emission line (in nm), measured under pressure:

What temperature was this wavelength measured at (in K)?:

Click this button to calculate the pressure:

The pressure (in GPa) using a linear *p*-*v* fit is:

The pressure (in GPa) using the *p*-*v* equation suggested by Mao, Bell, and Steinberg is: