Body Fat Calculator

Calculate your body fat percentage using the U.S. Navy Method. Get accurate body fat estimates with measurements of height, weight, neck, waist, and hip circumference.

years
cm ft in
kg
cm
cm
cm
Body Fat (U.S. Navy Method) 24.1%
Body Fat Category Fitness
Body Fat Mass 16.9 kg
Lean Body Mass 53.1 kg
Ideal Body Fat for Given Age
(Jackson & Pollock)
18.4%
Body Fat to Lose to Reach Ideal 4.0 kg
Body Fat (BMI method) 26.9%

Body Fat Categories

According to the American Council on Exercise (ACE)

Male

Category Body Fat Range
Essential Fat 2-5%
Athletes 6-13%
Fitness 14-17%
Average 18-24%
Obese 25%+

Female

Category Body Fat Range
Essential Fat 10-13%
Athletes 14-20%
Fitness 21-24%
Average 25-31%
Obese 32%+

Ideal Body Fat Percentages by Age (Jackson & Pollock)

Age Female Male
2017.7%8.5%
2518.4%10.5%
3019.3%12.7%
3521.5%13.7%
4022.2%15.3%
4522.9%16.4%
5025.2%18.9%
5526.3%20.9%

What is Body Fat Percentage?

Body fat percentage is the percentage of your total body weight that is made up of fat. It includes both essential body fat and storage body fat. Essential fat is necessary to maintain life and reproductive functions, while storage fat consists of fat accumulation in adipose tissue.

U.S. Navy Method

The U.S. Navy Method uses circumference measurements along with height to estimate body fat percentage. This method was developed by the Naval Health Research Center by Hodgdon and Beckett in 1984. It is one of the most widely used methods for estimating body fat percentage.

Formulas

Male:

Body Fat % = 86.010 × log10(waist - neck) - 70.041 × log10(height) + 36.76

Note: Measurements are converted from cm to inches for calculation

Female:

Body Fat % = 163.205 × log10(waist + hip - neck) - 97.684 × log10(height) - 78.387

Note: Measurements are converted from cm to inches for calculation

Essential vs. Storage Body Fat

Essential body fat is necessary to maintain life and reproductive functions. The essential fat percentage is typically 2-5% for men and 10-13% for women. This fat is found in the heart, brain, lungs, liver, kidneys, intestines, muscles, and lipid-rich tissues throughout the central nervous system.

Storage body fat consists of fat accumulation in adipose tissue, which can be subcutaneous (under the skin) or visceral (around organs). While some storage fat is necessary for protection and insulation, excessive amounts can lead to health problems.

Health Considerations

Maintaining a healthy body fat percentage is important for overall health. Too much or too little body fat can lead to various health issues.

Excessive body fat, particularly visceral fat around organs, is associated with increased risk of heart disease, type 2 diabetes, high blood pressure, certain cancers, stroke, osteoarthritis, fatty liver disease, kidney disease, and sleep apnea.

Having too little body fat can also be dangerous, potentially leading to hormonal imbalances, weakened immune system, decreased bone density, heart problems, and fertility issues. Athletes and individuals with very low body fat should consult with healthcare professionals to ensure they maintain healthy levels.