Body Fat % Estimator
US Navy circumference method and Jackson-Pollock skinfold body fat estimation with lean mass and category.
Inputs
Fill in the inputs and press Calculate to see your science-backed results.
How to use Body Fat % Estimator
US Navy circumference method and Jackson-Pollock skinfold body fat estimation with lean mass and category.
Choose measurements that describe your actual session or situation, confirm the units, then calculate. Read the result alongside its assumptions and use the tool again when your inputs change.
Inputs explained
Method
Choose the option that matches your context; available options include US Navy (circumference), Jackson-Pollock 3-site, Jackson-Pollock 7-site.
Sex
Choose the option that matches your context; available options include Male, Female.
Height (cm)
Enter a measured or estimated value (minimum 140) (maximum 220), using the unit indicated in the field label.
Weight (kg)
Enter a measured or estimated value (minimum 30) (maximum 200), using the unit indicated in the field label.
Neck (cm)
Enter a measured or estimated value (minimum 25) (maximum 60), using the unit indicated in the field label.
Waist (cm)
Enter a measured or estimated value (minimum 50) (maximum 180), using the unit indicated in the field label.
Hip (cm, females)
Enter a measured or estimated value (minimum 0) (maximum 180), using the unit indicated in the field label.
How to interpret the output
Body-composition measures depend on method and hydration. Look for trends instead of interpreting a single reading in isolation.
Repeat measurements using similar conditions when monitoring trends. Numerical predictions can vary with input accuracy, measurement method and individual circumstances.
Limitations and responsible use
Circumference and skinfold methods have ±3-4% error. DEXA is more accurate but still has limitations.
Read the full disclaimerFrequently asked questions
What does the Body Fat % Estimator estimate?
US Navy circumference method and Jackson-Pollock skinfold body fat estimation with lean mass and category.
Which information do I need for this bodycomp tool?
Provide Method, Sex, Height (cm), Weight (kg), Neck (cm), and any additional fields shown above. Use your own relevant measurements and the units indicated in each field.
How should I interpret the result?
Body-composition measures depend on method and hydration. Look for trends instead of interpreting a single reading in isolation. Compare results with your goals and other relevant observations rather than using a single output to make a major decision.
Disclaimer: Circumference and skinfold methods have ±3-4% error. DEXA is more accurate but still has limitations. Read the medical disclaimer.
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