BMI
Body mass index from weight and height, using the standard WHO categories for adults.
Open calculatorBody fat
The US Navy method estimates body-fat percentage from neck and waist circumferences (plus hip circumference for women) and height. It provides a practical tape-measure reading rather than a clinical laboratory measurement.
cm
Neck circumference in centimetres — just below the larynx (Adam's apple), tape sloping slightly downward towards the front, not compressing the tissue.
cm
Abdomen circumference in centimetres — tape horizontal at navel level, breathing out naturally, without pulling the stomach in.
cm
Estimated body fat
16.9% · Fitness
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Educational estimate only. Not medical, tax, legal or financial advice.