Better Health Channel
Calculate your energy needs

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).

Kilojoules calculator



Note: If your work/occupation fits into 'Very sedentary', 'Sedentary', 'Lightly active' or 'Moderately active' and you exercise strenuously (30 to 60 minutes, 4 to 5 times per week), change your selection to the next highest level of activity.

If your current weight is outside your healthy weight range (BMI 20-25), enter your ideal/healthy weight rather than your current weight. You can find your ideal/healthy weight for your height by using this BMI Calculator.

Your daily energy requirements

0 kJ

Based on material provided by the National Health and Medical Research Council

Calculate your energy needs