Body Fat Calculator
US Navy method body fat from tape measurements.
Enter your values
ⓘ Live results
Results
- Body fat
- 18%
- Category
- Fitness
- Fat mass
- 30.5 lb
- Lean mass
- 139.5 lb
Quick answer
The US Navy method estimates body fat from the log of neck, waist and hip circumferences relative to height, accurate to about ±3%.
How to use the Body Fat Calculator
- 1Measure neck, waist and (for women) hips with a tape.
- 2Enter height and weight.
- 3Read the estimated body fat percentage.
Worked example
Using the values the calculator loads with:
Inputs
- SexMale
- Height69 in
- Neck circumference15 in
- Waist at navel34 in
- Hip (women only)38 in
- Weight170 lb
Results
- Body fat18%
- CategoryFitness
- Fat mass30.5 lb
- Lean mass139.5 lb
Frequently asked questions
How accurate is the tape method?
Within about 3% of a DEXA scan for most people, and consistent enough to track change over time.
Where do I measure the waist?
At the navel for men, at the narrowest point for women, with the tape snug but not compressing skin.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.