Body Fat Categories for Australian Adults
| Category | Men | Women |
|---|
| Essential fat | 2–5% | 10–13% |
| Athletic | 6–13% | 14–20% |
| Fitness | 14–17% | 21–24% |
| Acceptable / Healthy | 18–24% | 25–31% |
| Obese | 25%+ | 32%+ |
Source: American Council on Exercise (ACE). Used widely in Australian clinical and fitness settings.
How the Navy Method Works
The US Navy Method uses body circumference measurements to estimate body fat. For men, it uses height, waist and neck measurements. For women, hip circumference is also included. The formula was developed to be practical in field conditions and correlates well with more accurate methods like DEXA scans for most people.
It is more accurate than BMI alone because it accounts for body shape, not just weight relative to height. A muscular person may have a high BMI but low body fat — circumference measurements capture this better.
Frequently Asked Questions
What is a healthy body fat % for Australian adults?▾
For Australian men, a healthy body fat range is generally 8–19% (athletic to acceptable). For women, 21–33% is considered healthy. Athletes may be lower; over 25% for men and 32% for women is considered obese. These are general guidelines — individual variation exists and should be discussed with a GP.
How accurate is the Navy Method?▾
The US Navy Method has an accuracy of roughly ±3–4% compared to DEXA scans (the gold standard). It is more accurate than BMI-based estimates for most people, particularly those who are muscular or carry weight unevenly. For clinical accuracy, DEXA or hydrostatic weighing is recommended — but for tracking progress at home, the Navy Method is a reliable and free option.
Is body fat % better than BMI?▾
Body fat percentage is a more direct measure of actual fat tissue than BMI. BMI can misclassify muscular people as overweight and underweight people as healthy if they have low muscle mass. However, both are proxy measures. Waist circumference and waist-to-height ratio are also useful tools your GP can use alongside BMI and body fat percentage.
How do I reduce my body fat?▾
A combination of a modest caloric deficit (300–500 kcal/day below maintenance), adequate protein intake (1.6–2.2g per kg of bodyweight), and resistance training to preserve muscle mass is the most evidence-based approach. Cardio aids calorie burn but is not essential. Crash diets typically lead to muscle loss and rebound weight gain. Speak to an Accredited Practising Dietitian (APD) for personalised advice.
What measurements do I need?▾
For men: height, weight, waist circumference (measured at the navel), and neck circumference (just below the larynx). For women: add hip circumference at the widest point. Measure in the morning before eating, using a flexible tape measure held snugly but not tight, and take 2–3 readings to average out any variation.