A unit of energy in the British system of units. Still used to define the amount of energy amount of energy contained in foods. Defined as the amount of energy required to raise the temperature of 1 gram of water from 14.5°C to 15.5°C.
|1 calorie||=||4.184 J||1 calorie||=||3.087 ft lbwt|
|1 calorie||=||3.968x10-3Btu||1 kCal||=||4.184 kJ|
- Note: The calorific value of food and values presented on diet sheets are normally in kilo calories (kCal). However, people often say calories when talking about diet and actually mean kcal.
|Activity||kCal used per hour|
|Digging||360 to 420|
|Jogging 5 to 10 mph||500 to 800|
|Swimming||500 to 700|
|Walking 2 mph||150 to 240|
|Walking 4 mph||300 to 400|
This is based on an average person weighing 68kg.