code: public MDecimal getKelvin() {
  		MDecimal result = new MDecimal(currentUnit.getConverterTo(KELVIN)
  				.convert(doubleValue()));
  		logger.trace(MMarker.GETTER, "Converting from {} to Fahrenheit : {}",
  				currentUnit, result);
  		return result;
  	}
docs: Kelvin is the SI Unit