What is heat capacity measured in?
Heat capacity is a derived unit. It can be measured in units of calories/g°C or Joules/g°C.
The specific heat of water can be listed as...
A note about calories
1 Calorie (US Dietary Calorie) = 1 kcal = 1000 calories
The c and C are case sensitive when it comes to Calories, or is it calories?
Food packaged in the US uses Dietary Calories to give information about the energy content of foods. Foods packaged almost everywhere else report the energy content of foods in kcal.
Here is a video explaining the use of the specific heat capacity of water.