Weight Loss Calculator Australia

How to Lose Weight Safely in Australia: The Science of Calorie Deficits

Weight loss comes down to a sustained calorie deficit — consuming fewer calories than your body burns. The key is finding a deficit that's large enough to produce steady results but small enough to be sustainable and preserve muscle mass. Severe restriction (below 1,200 cal for women, 1,500 for men) often backfires by slowing metabolism and causing muscle loss.

Safe Rate of Weight Loss

• 0.25–0.5kg/week is the recommended rate for most people — sustainable, preserves muscle, minimises hunger
• 0.5–1kg/week may be appropriate early in a weight loss journey for people with significant weight to lose
• More than 1kg/week is generally not recommended except under medical supervision — increases risk of muscle loss, nutritional deficiencies, and metabolic adaptation

Weight Loss After 50

Slower, gentler deficits work better for women over 50 due to metabolic changes from menopause. A 250–400 calorie deficit (rather than 500+) combined with high protein intake and resistance training produces better long-term results with less muscle loss and better energy levels.

Not medical advice. Consult your GP or an Accredited Practising Dietitian for personalised guidance, especially if you have any health conditions.