Temperature Units Issue

[Elie.Trad]

@waqarkhan9494 check this:

Temperature value conversion

These formulas may make a little more sense if you’re familiar with Temperature Differences in Revit. Revit uses absolute units internally - meaning that in order to convert temperatures to numbers you have to do a weird conversion to temperature differences in order to get unitless values and therefore ignore the difference in units. That seems to be how Revit handles all temperature units now. Parameters that read ΔT return correct values (I assume because they’re essentially unitless). While…

Converting temperature difference parameter to number?

and use this formula to convert:

rankine = 273.15;
((celcius-0) + rankine)/((1-0) + rankine)