Body Fat Calculator 📏
Calculate your body fat and BMI using the **Navy Method** (BMR not included).
Body Fat Calculator – Assess Your Body Composition Accurately
The Body Fat Percentage is a key metric for understanding your body's composition. It helps you determine how much of your weight comes from fat versus lean mass such as muscles, bones, and organs. Our free online Body Fat Calculator provides accurate results using measurements like waist, neck, hips (for women), and height. This calculator is suitable for adults, athletes, parents, and anyone interested in tracking fitness or health levels.
Body fat percentage offers a deeper insight than BMI alone. High body fat levels may increase risk of cardiovascular issues, diabetes, and metabolic disorders, while too little body fat may indicate hormonal imbalances or malnutrition. Our goal is to make body fat assessment clear, actionable, and meaningful, helping you make informed lifestyle and fitness decisions.
Accurate Body Fat Estimates
This calculator provides reliable body fat percentage estimates for adults of all ages, using the US Navy formula. It helps you understand body composition beyond just weight.
Metric & Imperial Support
You can enter measurements in both metric (cm/kg) and imperial (in/lbs) units. The calculator adjusts formulas automatically to provide consistent results.
Health-Based Guidance
After calculating your body fat percentage, you’ll receive insights on your fitness level and healthy ranges, helping you understand what actions may benefit your overall health.
For Everyone
This tool is designed for men and women of all ages, from beginners to fitness enthusiasts. Its simple interface ensures anyone can assess body fat percentage easily.
What Is Body Fat Percentage?
Body fat percentage measures the proportion of fat in your body relative to total weight. Unlike BMI, it directly differentiates fat mass from lean mass, providing a more precise picture of health. Ideal body fat varies by age, gender, and fitness level. Tracking body fat over time helps in understanding progress in fitness, weight management, and overall wellness.
Maintaining a healthy body fat percentage reduces risks for heart disease, diabetes, and other chronic conditions. Excessive or insufficient body fat can impact metabolism, immunity, and energy levels. Combining this metric with lifestyle factors, such as diet and exercise, helps optimize long-term health outcomes.
US Navy Body Fat Formula
Body fat percentage can be estimated using circumference measurements. Formulas differ for men and women:
- Men: 86.010 × log10(waist - neck) - 70.041 × log10(height) + 36.76
- Women: 163.205 × log10(waist + hip - neck) - 97.684 × log10(height) - 78.387
Heights and circumferences should be in the same units (cm or in). The formulas provide an estimate of body fat percentage that is widely used in fitness assessments.
Body Fat Categories & Interpretation
| Body Fat % | Category | Interpretation |
|---|---|---|
| Men: 2–5, Women: 10–13 | Essential Fat | Necessary for bodily functions; very low fat. |
| Men: 6–24, Women: 14–31 | Fitness / Healthy | Healthy body composition; low risk of lifestyle diseases. |
| Men: 25–31, Women: 32–39 | Overfat | Higher risk of metabolic or cardiovascular issues. |
| Men: 32+, Women: 40+ | Obese | High risk of serious health complications; lifestyle changes recommended. |
Frequently Asked Questions
Is this body fat calculator 100% accurate?
It provides an estimate based on standard formulas. Results may vary depending on body type and measurement accuracy.
Does it work for both men and women?
Yes, the formulas differ for men and women to account for body composition differences.
How often should I measure?
Once every 2–4 weeks is ideal to monitor changes in body composition.
What is a healthy body fat percentage?
Ranges vary by gender and age. Generally, men 6–24% and women 14–31% are considered healthy.
Can athletes use this calculator?
Yes, but highly muscular athletes may have higher readings that don’t reflect excess fat.
Can it help with weight management?
Yes, tracking body fat over time gives a more complete picture than weight alone for fitness planning.
Understanding your body fat percentage is essential for tracking health and fitness effectively. This calculator provides clear estimates, category insights, and guidance to help you make informed lifestyle choices. Combine measurements with a balanced diet and consistent exercise to achieve optimal wellness results.
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Body Fat Calculator – Accurate Body Fat % Using US Navy Formula | Solvezi