Body Fat Calculator

Estimate Your Body Fat Percentage

Use our free Body Fat Calculator to estimate how much of your body weight comes from fat versus lean mass. Enter your age, gender, height, weight, and circumference measurements above to get your result instantly, using the trusted US Navy method. This tool has been built with guidance from Dietician and Nutritionist Avni Kaul so you can understand exactly what your result means for your health.

What is Body Fat Percentage?

Body fat percentage is the share of your total body weight made up of fat, as distinct from muscle, bone, water, and other lean tissue. Unlike BMI, which only accounts for height and weight, body fat percentage offers a more accurate picture of your actual body composition, since two people with an identical BMI can carry very different amounts of muscle and fat.

Body Fat Calculator

Estimate your body fat percentage using the US Navy method — based on circumference measurements
% body fat
Fat Mass
kg
Lean Mass
kg
Body Fat Category
Your estimated body fat percentage using the US Navy circumference method.

How is Body Fat Calculated?

Our calculator uses the US Navy method, one of the most widely used non-invasive ways to estimate body fat. It works by measuring specific body circumferences:

  • Neck circumference
  • Waist circumference
  • Hip circumference (for women)
  • Height

These measurements feed into a formula that estimates your body fat percentage without needing specialised equipment such as calipers or a DEXA scan.

Understanding Your Body Fat Result

Category

Women

Men

Essential Fat

10 to 13%

2 to 5%

Athletes

14 to 20%

6 to 13%

Fitness

21 to 24%

14 to 17%

Average

25 to 31%

18 to 24%

Obese

32% and above

25% and above

CategoryWomenMen
Essential Fat10 to 13%2 to 5%
Athletes14 to 20%6 to 13%
Fitness21 to 24%14 to 17%
Average25 to 31%18 to 24%
Obese32% and above25% and above

These ranges are general guidelines. What counts as a healthy range can shift depending on age, activity level, and individual body type.

Why Body Fat Percentage Matters More Than Weight Alone

A number on the scale doesn’t tell you what your body is actually made of. Two people with the same weight and height can have very different health profiles depending on their fat-to-muscle ratio. Tracking body fat percentage rather than weight alone helps you:

  • Understand whether weight loss is coming from fat or muscle
  • Set more meaningful fitness and nutrition goals
  • Track progress during strength training or muscle-building phases
  • Get a clearer picture of overall metabolic health

Limitations of Body Fat Calculators

While the US Navy method offers a reliable estimate, it isn’t as precise as clinical methods such as DEXA scans or hydrostatic weighing. Accuracy also depends on correctly locating and measuring each circumference. For a more precise assessment and a plan built around your actual body composition, a consultation with Dietician and Nutritionist Avni Kaul, a trusted Dietician in Delhi, is recommended. If your goal is to bring your body fat percentage down, her weight loss management programme can help build a plan around your results.

Explore Our Other Health Calculators

Body fat percentage is just one piece of the picture. Pair it with our other free tools for a fuller view of your health:

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