A kilojoule (like a calorie) is a measure of energy in food. On average, people eat and drink around 8700 kilojoules a day, however we're all different.
To maintain your current weight, use your current (actual) body weight in the calculator below.
To lose or gain weight, use your ideal body weight in the calculator below. This will give you an estimated daily kilojoule requirement to help you meet your weight loss (or gain) goal. You can find your ideal body weight for your height by using this BMI calculator (a healthy weight range for an adult is a BMI between 20 and 25).
Based on material provided by the National Health and Medical Research Council