What is BFP (Body Fat Percentage)?

BFP stands for Body Fat Percentage - the proportion of your total body weight composed of fat tissue. It is a more accurate health indicator than weight or BMI alone.

How accurate is the Navy Method body fat calculator?

The U.S. Navy circumference method has an accuracy of ±3.5%, comparable to a $100 DEXA scan. It is much more reliable than BIA body fat scales which can vary ±10% based on hydration.

How do I calculate body fat percentage at home?

Use our free calculator with either the BMI-based formula (only needs height, weight, age, gender) or the U.S. Navy method (also requires neck, waist, and hip measurements with a tape measure).

What is a healthy body fat percentage?

For men, a healthy body fat percentage is typically 14-17% (fitness range). For women, a healthy range is 21-24%. Athletes tend to be lower: 6-13% for men, 14-20% for women.

How is BFP different from BMI?

BMI only considers height and weight, so it cannot distinguish between muscle and fat. BFP directly measures body composition. A muscular person may have a high BMI but a healthy BFP, while a skinny-fat person may have a normal BMI but a high BFP.

40% Body Fat — Women Obese

Excessive body fat with health implications. Mobility may be affected. Medical supervision recommended for any weight loss program.

Appearance

Excessive body fat with health implications. Mobility may be affected. Medical supervision recommended for any weight loss program.

Health Level

⚠️ Elevated health risks. Losing body fat through diet and exercise is strongly recommended for long-term health.

How to Reach 40% Body Fat

Nutrition

Start with a 300-500 calorie deficit. Prioritize protein and vegetables. Reduce processed foods and sugary drinks.

Training

Start with 3x/week full-body strength training. Walk 8-10K steps daily. Add 1-2 cardio sessions.

Timeline

8-20 weeks depending on starting point. Use our Goal Timeline Calculator for a personalized plan.

Plan Your Timeline to 40% →

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