GNU Units

My first Web Application with a Python (2.7) micro-framework was back in 2015, a web front-end for the GNU units of measurement converter. Still working, have a look here.

For example :

Definition /from unit:

   (400 W/m^2 / stefanboltzmann)^(1/4)

to unit:

   kelvin

   (400 W/m^2 / stefanboltzmann)^(1/4)= 289.80923 kelvin