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.

BMR Formula Comparison

See why different BMR calculators give you different results. Compare 4 scientific formulas at once.

Gender

Age

Height (cm)

Weight (kg)

Body Fat % (optional)

Required for Katch-McArdle and Cunningham formulas.

Why Do BMR Calculators Give Different Results?

BMR formulas use different mathematical models and were developed on different populations. Mifflin-St Jeor is the modern standard, while Harris-Benedict is older and tends to overestimate. Katch-McArdle and Cunningham use lean body mass, making them more accurate for athletic individuals.

Which BMR Formula Should I Trust?

For most people, Mifflin-St Jeor is the best choice. If you know your body fat percentage, use Katch-McArdle. The difference between formulas is typically 50-150 calories, which is within the margin of error. Use the average as your starting point.