depends on why you are measuring it...
if you are measuring to know how much food it can hold, measure inside.
The fridge is cold inside because the cooling system inside the fridge absorbs heat from the interior, keeping it at a lower temperature. The warmth outside the fridge is a byproduct of the cooling process, as the heat removed from inside the fridge is released outside. This heat release helps maintain the temperature difference needed for the fridge to stay cold inside.
A fridge cools its interior by removing heat from inside and expelling it outside. The warm air that is released during the cooling process accumulates on the external surface of the fridge, making it warm to the touch. This heat exchange is necessary for the fridge to maintain a constant low temperature inside.
Thermal energy is removed from the inside of a fridge by the coolant circulating through the system. The coolant absorbs heat as it evaporates in the evaporator coils inside the fridge, cooling the air inside. The heat absorbed by the coolant is then released outside the fridge through the condenser coils, completing the refrigeration cycle.
Because the temperature is the same inside and outside the can, moisture condenses on the outside once you take the can from the fridge into a warmer humid place, however this would not happen if you took the cold can to a place at least as cold as the fridge.
because its insulated like a starefome cooler
The inside.
A fridge stays cold and maintains its temperature through a process called refrigeration. Inside the fridge, there is a refrigerant that absorbs heat from the air inside the fridge and releases it outside. This continuous cycle of absorbing and releasing heat keeps the inside of the fridge cool. Additionally, the fridge is insulated to prevent heat from entering, helping to maintain the cold temperature.
A fridge gives off heat energy as it extracts heat from inside and releases it outside to maintain a cool temperature inside. This heat is dissipated by the fridge's coils, usually located at the back or bottom of the appliance.
Callipers
I'm pretty sure it's the outside...
The energy comes from the heat taken from the heat/energy inside of the refrigerator/fridge. A fridge takes heat energy from inside the fridge and dumps it outside the fridge into the the pipes on the back of the fridge and into the room.
Mold generally grows better outside the fridge than inside it, as refrigerators maintain cooler temperatures and lower humidity levels that inhibit mold growth. However, certain types of mold can still thrive in warmer spots within the fridge, particularly on perishable foods that are past their prime. Overall, the controlled environment of a fridge slows down mold development compared to the typically warmer and more humid conditions found outside.