Body Fat Percentage Calculator - User Guide

1. Requirements

• User must be at least 18 years old
• Measurements should be in centimeters (cm)
• Need a flexible measuring tape
• Remove heavy clothing before measuring

2. Input Fields Explanation

a. Gender Selection

• Choose between Male/Female
• Note: Females require additional hip measurement

b. Age

• Enter your current age (18-100 years)

c. Waist Circumference

• Measure at narrowest point (men)
• Measure at natural waistline (women)
• Exhale normally before measuring

d. Neck Circumference

• Measure below the larynx (Adam's apple)
• Keep tape horizontal

e. Hip Circumference (Women Only)

• Measure at widest part of hips
• Appears automatically for female users

f. Height

• Enter current height in centimeters
• Measure without shoes

3. Calculation Process

1. Fill all required fields
2. Click "Calculate Body Fat" button (#5F38D5 color)
3. View results in the bottom section
4. Results include:
   • Body fat percentage
   • Health category classification

4. Result Interpretation

For Men:

• Essential Fat: <6%
• Athlete: 6-13%
• Fitness: 14-17%
• Average: 18-24%
• Obese: 25%+

For Women:

• Essential Fat: <14%
• Athlete: 14-20%
• Fitness: 21-24%
• Average: 25-31%
• Obese: 32%+

5. Important Notes

• Uses U.S. Navy body fat formula
• Measurements converted to inches internally
• Results are estimates (±3% accuracy)
• Not suitable for pregnant women
• Consult professionals for medical advice

6. Measurement Tips

• Take measurements 3 times and average
• Measure in the morning on empty stomach
• Keep tape snug but not compressing skin
• Maintain proper posture during measurements

7. Error Prevention

• All fields marked with * are required
• Minimum age: 18 years
• Measurements must be >0
• Hip measurement only required for females

8. Technical Specifications

• Responsive design works on all devices
• Automatic input validation
• Real-time calculation
• Gender-specific formula application
• Metric to imperial conversion built-in

9. Safety Considerations

• No personal data collected
• Calculations done client-side
• No data storage
• Refresh page to clear all data

10. Limitations

• Doesn't account for muscle mass
• Not accurate for extreme body types
• Doesn't consider genetic factors
• Shouldn't be used for medical diagnosis

Style Customization (For Developers):

• Main container class: containervolufmeddf2234
• Body class: bodymafkefdf1123
• Primary button color: #5F38D5
• Uses CSS variables for easy color changes
• Responsive breakpoints included

FAQ:
Q: Why hip measurement only for women?
A: Biological fat distribution differences accounted in the Navy formula

Q: Minimum age requirement?
A: 18 years - formula validated for adults only

Q: Can I use inches instead?
A: Calculator automatically converts cm to inches internally

Q: How accurate is this?
A: ±3% compared to professional methods

Q: Why different categories for genders?
A: Biological essential fat requirements differ