The formula to convert Kelvin to Fahrenheit is
ºF = 1.8 x (K - 273) + 32.
So first you’d subtract whatever kelvin you had and 273 so:
312-273=39
and then you’d take that answer and multiple by 1.8
39x1.8=70.2
and then you add 32 to your answer
70.2+32= 102.2 fahrenheit