Body Fat Calculator

The Body Fat Calculator helps you estimate your total body fat percentage using simple body measurements. For the most accurate results, measure to the nearest 0.5 cm and use the Metric Units option if you prefer the international standard.

ages 18 - 100
Measure around the neck at the narrowest point
Measure at the level of the navel

Understanding Body Fat

In scientific terms, body fat is called adipose tissue.
It’s more than just stored energy — it plays vital roles in the body, including:

  • Acting as a backup energy source

  • Producing important hormones

  • Providing cushioning for organs
    and insulation from temperature changes

Body fat is made up of two types: essential fat and storage fat.

Essential vs. Storage Fat

Essential fat is the minimum amount your body needs to function properly. It supports basic life functions and hormone balance.

  • For men, essential fat is around 2–5% of body weight.

  • For women, it’s slightly higher — 10–13% — to support reproductive health.

Storage fat is the additional fat your body keeps in case of energy shortage. It’s found under the skin (subcutaneous fat) and around internal organs (visceral fat). While some stored fat is healthy, excess fat, especially visceral fat, can increase health risks.

Excess Fat, Overweight & Obesity

Being overweight or obese happens when stored body fat builds up faster than it’s used. However, “overweight” doesn’t always mean “unhealthy.” Muscular athletes, for example, can weigh more because of lean muscle, not excess fat.

How fast fat accumulates depends on factors like genetics, hormones, diet, and activity level.

Men and women also store fat differently — men often gain it around the abdomen, while women tend to store more around the hips and thighs.

After age 40 (or post-menopause for women), hormonal changes make fat storage around the midsection more common.

Health Risks of Excess Body Fat

According to the World Health Organization (WHO), obesity is one of the top preventable causes of death globally. It’s linked to a wide range of health problems, including:

  • Heart disease and high blood pressure
  • Type 2 diabetes and insulin resistance
  • High LDL (“bad”) cholesterol and low HDL (“good”) cholesterol
  • Stroke and certain types of cancer
  • Sleep apnea and breathing difficulties
  • Joint pain, reduced mobility, and poor mental health

Excess visceral fat (fat stored deep in the abdomen) is particularly dangerous. It disrupts hormone balance and triggers inflammation through chemicals called cytokines, which can increase the risk of cardiovascular disease.

Over time, this can lead to blocked arteries, insulin resistance, and serious chronic illnesses.

Balanced Fat = Better Health

While too much body fat can harm your health, too little can also cause issues such as:

  • Low energy and weakened immunity
  • Hormonal imbalance
  • Poor nutrient absorption
  • Increased injury risk

The goal isn’t to eliminate fat completely — it’s to maintain a healthy body fat percentage that supports energy, hormones, and long-term wellness.