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Body Fat % Calculator

Estimate your body fat percentage using the U.S. Navy method. All you need is a tape measure.

Important Medical Disclaimer

This tool is for informational and educational purposes only. Not intended as medical advice, diagnosis, or treatment. Always consult a licensed healthcare professional before making changes to your diet, hydration, or health routine.

Individual hydration needs vary based on medical conditions, medications, and personal health factors. If you have kidney disease, heart conditions, or other medical issues, consult your doctor.

Your Measurements

Measure at narrowest point below Adam's apple

Measure at navel level

For lean/fat mass breakdown

Your Body Fat Estimate

Estimated Body Fat

0%

Body Fat Categories (Men)

Essential Fat2-5%
Athletes6-13%
Fitness14-17%
Average18-24%
Obese25%+

About the U.S. Navy Method

The U.S. Navy body fat formula uses circumference measurements to estimate body fat percentage. While not as accurate as DEXA scans or hydrostatic weighing, it's a reliable, free method that only requires a tape measure.

Measuring Tips

  • Measure first thing in the morning for consistency
  • Pull the tape snug but don't compress the skin
  • Take each measurement 2-3 times and use the average
  • Stand relaxed with normal breathing when measuring

Important Medical Disclaimer

This tool is for informational and educational purposes only. Not intended as medical advice, diagnosis, or treatment. Always consult a licensed healthcare professional before making changes to your diet, hydration, or health routine.

Individual hydration needs vary based on medical conditions, medications, and personal health factors. If you have kidney disease, heart conditions, or other medical issues, consult your doctor.