General calculator
Body Fat Calculator
Calculate your body fat percentage using the U.S. Navy method. Accurate measurements for men and women with fitness category breakdown.
Introduction
Knowing your body fat percentage is a much better indicator of health and fitness than just looking at the scale. While weight includes muscle, bone, and water, body fat specifically measures your adipose tissue. Our Body Fat Calculator uses the U.S. Navy Method, a scientifically validated formula that requires only a few simple tape measurements to provide a reliable estimate of your body composition.
How to Use
Select your gender and enter your height. For men, measure the circumference of your neck and your waist (at the navel). For women, measure your neck, waist (narrowest part), and hips (fullest part). Ensure the tape is level and snug but not digging into the skin. Click "Calculate" to see your body fat percentage and fitness category.
Formula
The U.S. Navy formula uses logarithmic equations based on the height and the difference between various body circumferences to estimate body density and subsequent fat percentage.
Examples
Example: A male with 180cm height, 40cm neck, and 90cm waist has an estimated body fat of 18.4%, which falls into the "Fitness" category.
Results Explained
Your results include: 1. Body Fat Percentage: The portion of your body that is fat. 2. Fitness Category: Based on ACE guidelines (Essential Fat, Athletes, Fitness, Average, or Obese). 3. Visual indicator: A color-coded result for quick understanding.
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Frequently Asked Questions
How accurate is the Navy Method?
For most people, the Navy Method is accurate within 3-4% of more expensive methods like DEXA scans or hydrostatic weighing. It is excellent for tracking progress over time.
What is a healthy body fat percentage for men?
For men, 14-24% is considered healthy/average. Athletes are often between 6-13%, while anything over 25% is classified as obese.
What is a healthy body fat percentage for women?
For women, 21-31% is considered healthy/average. Athletes are often between 14-20%, while anything over 32% is classified as obese.
Where should I measure my waist?
Men should measure horizontally at the level of the navel. Women should measure at the narrowest point of the natural waistline, usually just above the navel.
Should I measure in the morning or evening?
Consistency is key. It is best to measure in the morning, fasted, before you have eaten or exercised, to avoid the effects of bloating or temporary muscle pump.
Can I use this if I am pregnant?
Body fat calculations are not accurate during pregnancy due to the significant changes in body composition, fluid retention, and fetal growth.