Body Fat Calculator
Use this free body fat calculator to get instant results. Simply enter your data and get processed output immediately. Works entirely in your browser with no signup required.
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How It Works
- Select your measurement system (Metric or Imperial).
- Select your gender (calculation differs for men and women).
- Measure and enter your Height, Waist, and Neck circumference.
- For females, also enter Hip circumference.
- Click "Calculate Body Fat" to see your estimated percentage.
Use Cases
- Tracking fitness progress
- Health risk assessment
- Setting weight loss goals
- Bodybuilding cut monitoring
Frequently Asked Questions
How accurate is the US Navy Method?
It is considered one of the most accurate "tape measure" methods, typically within 1-3% of hydrostatic weighing.
Why do I need neck measurement?
Neck circumference is used as a proxy for lean body mass distribution in the formula.
Is it suitable for athletes?
It can be reasonably accurate, but highly muscular individuals might get a slightly inflated reading.
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