Body Fat Percentage Calculator

--Body Fat %
--Fat Mass (kg)
--Lean Mass (kg)
--Category

Body Fat Categories

CategoryMenWomen
Essential Fat2–5%10–13%
Athletes6–13%14–20%
Fitness14–17%21–24%
Average18–24%25–31%
Obese≥ 25%≥ 32%

What Is Body Fat Percentage?

Body fat percentage is the proportion of your total body weight that is composed of fat tissue. Unlike BMI, which only uses height and weight, body fat percentage distinguishes between fat mass and lean mass (muscle, bone, organs, water), giving a more meaningful picture of your body composition and overall health.

The US Navy Body Fat Method

The US Navy method estimates body fat from circumference measurements. For men, it uses neck and abdomen circumference plus height. For women, it adds hip circumference to the equation. The formula was developed to provide a quick, equipment-free alternative to hydrostatic weighing and DEXA scanning, with an accuracy of approximately ±3–4% for most individuals.

How to Take Accurate Measurements

  • Neck: Measure just below the larynx (Adam's apple) with a slight downward slope at the front.
  • Waist (men): Measure at the navel level.
  • Waist (women): Measure at the narrowest point, usually just above the navel.
  • Hip (women): Measure at the widest point around the buttocks.
  • Measure in the morning before eating, stand straight, and do not flex.

Healthy Body Fat Ranges

The American Council on Exercise (ACE) categorises body fat into five groups. Athletes and fitness enthusiasts aim for the lower ranges. Essential fat is the minimum required for normal physiological function — going below this level is dangerous.

Frequently Asked Questions

Is the Navy method accurate?
The US Navy method has an error range of about 3–4 percentage points. It is less precise than DEXA scanning or hydrostatic weighing but is a reliable, equipment-free method for tracking trends over time.
What is a healthy body fat percentage for women?
For women, a body fat percentage of 21–31% is generally considered in the healthy "average" range. Athletes may maintain 14–20%, while essential fat for women is 10–13%.
How can I reduce body fat?
A combination of a calorie deficit (eating less than your TDEE), regular cardiovascular exercise, and resistance training to preserve muscle mass is the most effective and sustainable approach to reducing body fat.
Why does gender affect body fat calculations?
Women naturally carry more essential fat than men, particularly in the breasts, hips, and pelvic region, due to hormonal and reproductive needs. This is why the healthy ranges differ significantly between sexes.
Can I be at a normal BMI but have high body fat?
Yes. This is called "normal weight obesity" or being "skinny fat." People with low muscle mass but high fat mass can have a normal BMI while still having unhealthy body composition. Body fat measurement is a better indicator in such cases.