Body Fat (BMI Method): 0%
Body Fat Mass: 0 kg
Lean Body Mass: 0 kg
Ideal Body Fat: 0%
Fat to Lose: 0 kg
Want to understand your body composition? Our Body Fat Calculator estimates your body fat percentage using the U.S. Navy Method and BMI Method, providing insights into your fitness level and health. Perfect for weight management, fitness tracking, and health monitoring, it also calculates ideal body fat and fat to lose.
A Body Fat Calculator estimates your body fat percentage based on measurements like height, weight, neck, waist, and hip (for women). It uses:
Endorsed by health organizations, it’s a reliable tool for assessing body composition.
The calculator uses measurements to compute body fat percentage via the U.S. Navy Method and BMI Method. It also calculates body fat mass, lean mass, ideal body fat, and fat to lose.
Example (Male, Metric):
Weight: 70 kg, Height: 178 cm, Neck: 50 cm, Waist: 96 cm
Navy BFP: ~15.3% (Fitness)
BMI BFP: ~15.4%
Body Fat Mass: ~10.7 kg
Lean Mass: ~59.3 kg
Ideal Body Fat (Age 25): 10.5%
Fat to Lose: ~3.4 kg
Formulas:
Navy (Male, Metric): BFP = 495 / (1.0324 - 0.19077×log₁₀(waist-neck) + 0.15456×log₁₀(height)) - 450
Navy (Female, Metric): BFP = 495 / (1.29579 - 0.35004×log₁₀(waist+hip-neck) + 0.22100×log₁₀(height)) - 450
BMI (Adult Male): BFP = 1.20 × BMI + 0.23 × Age - 16.2
BMI (Adult Female): BFP = 1.20 × BMI + 0.23 × Age - 5.4
Fat Mass: BFP × Weight
Lean Mass: Weight - Fat Mass
You’ll get:
✔ Body fat percentage (Navy and BMI methods)
✔ Body fat category and mass
✔ Lean mass and ideal body fat
✔ Fat to lose for optimal health
| Description | Women | Men |
|---|---|---|
| Essential Fat | 10-13% | 2-5% |
| Athletes | 14-20% | 6-13% |
| Fitness | 21-24% | 14-17% |
| Average | 25-31% | 18-24% |
| Obese | 32+% | 25+% |
| Age | Women | Men |
|---|---|---|
| 20 | 17.7% | 8.5% |
| 25 | 18.4% | 10.5% |
| 30 | 19.3% | 12.7% |
| 35 | 21.5% | 13.7% |
| 40 | 22.2% | 15.3% |
| 45 | 22.9% | 16.4% |
| 50 | 25.2% | 18.9% |
| 55 | 26.3% | 20.9% |
Body fat, or adipose tissue, stores energy, secretes hormones, and provides insulation. It includes essential fat (2-5% for men, 10-13% for women) and storage fat. Healthy ranges are 8-19% for men and 21-33% for women. Excess body fat can lead to obesity, while too little can cause health issues.
Q1: How accurate is the U.S. Navy Method?
✅ It’s a reliable estimate but less accurate than bioelectric impedance or hydrostatic testing.
Q2: Why is hip measurement needed for women?
✅ Women store more fat in hips, soIt’s included for accurate body fat calculation.
Q3: What’s the difference between Navy and BMI methods?
✅ Navy uses body measurements for precision; BMI uses only height and weight.
Q4: Can athletes use this calculator?
✅ Yes, but high muscle mass may affect results. Consult a professional for precision.
Our Free Body Fat Calculator helps you understand your body composition with accurate U.S. Navy and BMI methods. Use it for fitness, health monitoring, and weight management.
🚀 Check your body fat now!
This Body Fat Calculator content is based on WHO, CDC, and U.S. Navy guidelines.
Body fat percentage measures the proportion of fat in your body, including essential and storage fat, to assess health and fitness.
Formula (Navy, Male): BFP = 495 / (1.0324 - 0.19077×log₁₀(waist-neck) + 0.15456×log₁₀(height)) - 450