You can't directly convert 1.0 Kelvin to Celsius. Here's why:

* Zero Point: The Kelvin scale starts at absolute zero (-273.15°C), which is the theoretical point where all molecular motion stops.

* Conversion Formula: The conversion formula between Kelvin and Celsius is:

°C = K - 273.15

Therefore, 1.0 Kelvin is equal to -272.15 degrees Celsius.