Body Fat Calculator
Free to use — no signup, no cost, no catch. 100% free.
View all 6 free calculatorsBody Fat Estimator
Estimate body fat percentage using the U.S. Navy circumference method
The U.S. Navy method provides an estimate. For precise measurement, consider DEXA scanning or hydrostatic weighing. Measure at navel level for waist, at narrowest point for neck.
✨ Your account is 100% free
Create a free account to save calculator results, track health trends over time, and unlock 2 free AI health analyses every month — including drug interaction checks, supplement analysis, and personalized meal plans. No credit card needed, ever.
Already have an account? Sign in
🔬 AI Drug Interaction Check
Enter your medications and supplements — our AI flags dangerous interactions your pharmacist might miss.
Try Free🥗 Personalized Meal Plans
AI-generated meal plans tailored to your conditions, medications, and nutritional needs.
Try Free📊 Health Research Engine
Search clinical trials, emerging treatments, and evidence-based health insights powered by AI.
Try FreeGet weekly health insights
Science-backed tips on medications, supplements, nutrition, and lab results — delivered free to your inbox.