Question 1

How accurate is the US Navy method for calculating body fat?

Accepted Answer

The US Navy method is generally accurate within 3-4% of underwater weighing tests for most people. It's one of the most reliable circumference-based methods available. However, it may be less accurate for individuals with very athletic builds or those with unusual fat distribution patterns.

Question 2

Why is my body fat percentage different from what my scale shows?

Accepted Answer

Bathroom scales that measure body fat typically use bioelectrical impedance analysis (BIA), which can be affected by hydration levels, recent exercise, and even the time of day. The US Navy method used by this calculator relies on body measurements and tends to be more consistent, though both methods provide estimates rather than exact measurements.

Question 3

How often should I measure my body fat percentage?

Accepted Answer

For tracking purposes, measuring once every 2-4 weeks is generally sufficient. Body composition changes happen gradually, and daily fluctuations in measurements can be misleading. Consistency in measurement technique and conditions (same time of day, similar hydration status) is important for meaningful comparisons.

Question 4

What's the difference between subcutaneous fat and visceral fat?

Accepted Answer

Subcutaneous fat is the fat stored just under the skin - the kind you can pinch. Visceral fat is stored deeper in the abdomen, surrounding internal organs. Visceral fat is more metabolically active and poses greater health risks. The waist measurement in this calculator helps account for visceral fat, as a larger waist circumference often indicates higher visceral fat levels.

Question 5

How can I lower my body fat percentage in a healthy way?

Accepted Answer

Healthy body fat reduction involves:

1. Creating a moderate calorie deficit through a balanced diet
2. Performing regular strength training to preserve muscle mass
3. Including cardiovascular exercise for overall calorie burning
4. Ensuring adequate protein intake (about 1.6-2.2g per kg of body weight)
5. Getting sufficient sleep and managing stress
6. Staying consistent over time - aim for 0.5-1% body fat reduction per month

Avoid crash diets or extreme exercise regimens, as these are unsustainable and can lead to muscle loss.

Body Fat Percentage Calculator

Measurement Tips

About the Calculation Method

BMI vs. Body Fat Percentage

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Body Fat Percentage Calculator

Measurement Tips

About the Calculation Method

BMI vs. Body Fat Percentage