Body Fat Percentage Calculator
Estimate your body fat percentage using the US Navy circumference method — no body scanner needed, just a tape measure.
What Does This Tool Do?
Estimate body fat percentage using the US Navy circumference formula — one of the most widely used non-equipment methods. Shows your fitness category from Essential to Obese.
Key Features
US Navy Formula
Accurate circumference-based method.
Male & Female
Different formulas and categories for each sex.
Fitness Category
Essential, Athlete, Fitness, Average or Obese.
Instant
Immediate result.
How to Use
- Select your sex.
- Enter height, waist and neck in centimetres.
- Females: also enter hip measurement.
- Click Calculate Body Fat %.
Frequently Asked Questions
How accurate is the US Navy formula?▾
Typically ±3–4% compared to DEXA scans — acceptable for monitoring trends. Not as accurate as hydrostatic weighing or DEXA but far more practical.
Where exactly do I measure waist?▾
Males: at the navel. Females: at the narrowest point (typically just above the navel).
Where do I measure neck?▾
Just below the larynx (Adam's apple), with the tape perpendicular to the long axis of the neck.
Complete Guide to Body Fat Percentage Calculator
When To Use This Tool
Use Body Fat Percentage Calculator whenever you need fast, accurate output without installing software. This tool is designed for speed, clarity, and repeatable results for day-to-day work.
Best Practices for Accurate Results
- Double-check the format of your input before running the tool.
- Test with a small sample first, then process larger data.
- Use Related Tools to verify, convert, or transform the output.
Why Users Prefer AdeDX
AdeDX tools are browser-based, free to use, and built to work across desktop and mobile devices. Most processing happens directly in your browser for fast performance and improved privacy.