Also, you don't need to make calculated columns for Kelvin and Farenheit. You can just have a measure for each. For example,
Farenheit Temp = [Celsius Temp] * 9/5 + 32
Where [Celsius Temp] is the measure on your Celsius temp column (e.g., AVERAGE(Table[TemperaturaCelsius]). If each data point on the chart is a single value, the aggregation won't matter (max, min, sum, average).
You can then have a SWITCH measure that returns the result of one of the measures (Celsius, Kelvin, Farenheit).
If this works for you, please mark it as the solution. Kudos are appreciated too. Please let me know if not.
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