We measure energy in kilojoules, just as we measure distance in kilometres. A kilojoule is the unit of measurement for how much energy a food contains that your body can use (which is dependent on the amount of carbs, protein and fat in the food), as well as how much energy is burned during exercise. The pre-metric name for kilojoules was calories, but for more than 30 years Australia has used the metric term. (One calorie has the same energy value as 4.186 kilojoules.) The abbreviation for kilojoules is “kJ”.
When we regularly consume more kilojoules than our body actually needs, the excess is stored right where we don’t want it – inside fat cells.
420 Kj Snack comparison: 3 cups of air popped pop corn, 1 banana, 1 tim tam, 1 skim latte, 2 egg whites with 1 slice wholemeal toast, 2 ½ kiwi fruit, 120 ml glass of red wine, 1 cup raspberries with 2 tbsp plain yoghurt and a tsp of honey, and 1 cup baby carrots with 2tbsp hummus. One Calorie is equal to 4.184 kilojoules. If you multiply a measurement of Calories by 4, it’s pretty close to the equivalent amount of kilojoules.