Body Fat Calculator
Body fat percentage from tape measurements (U.S. Navy method). Sex: 1 = male, 2 = female. Hip is only used for women
Interactive Sandbox
Adjust values in real-time and observe mathematical cause-and-effect
Direct computational model evaluating Body Fat Calculator.
Variable Mechanics
Roles, constraints & impacts
Sex (1 = male, 2 = female)
Sex (1 = male, 2 = female)
Height
Height
Neck
Neck
Waist (at navel)
Waist (at navel)
Hip (women only)
Hip (women only)
At a Glance
Gotchas, units & real-world use
Formula Nature & Mechanics
Direct computational model evaluating Body Fat Calculator.
Common Mistakes & Traps
- Ensure all input measurements share consistent units before calculating.
- Check for denominator values approaching zero to prevent undefined division.
- Follow standard order of operations (PEMDAS: Parentheses, Exponents, Multiply/Divide, Add/Subtract).
Dimensional Analysis & Units
Direct evaluation matching formula variable dimensions.
Real-World & Industry Application
Widely utilized across modern health applications, academic analysis, and engineering estimations.
Worked Example: Body Fat
Given:
- sex = 1
- height = 178
- neck = 38
- waist = 86
- hip = 95
- Waist − neck = 48 cm
- Body fat = 17.2% (U.S. Navy circumference method)
- Category: fitness
Answer: 17.2
Frequently Asked Questions
What is the Body Fat formula?
Men: 495 ÷ (1.0324 − 0.19077 log(waist − neck) + 0.15456 log(height)) − 450. Body fat percentage from tape measurements (U.S. Navy method). Sex: 1 = male, 2 = female. Hip is only used for women.
How do I calculate Body Fat?
Enter Sex (1 = male, 2 = female) (sex), Height (height), Neck (neck), Waist (at navel) (waist), Hip (women only) (hip) into the calculator. It applies Men: 495 ÷ (1.0324 − 0.19077 log(waist − neck) + 0.15456 log(height)) − 450 and shows every step of the working.
