Enter Your Details
Uses the Deurenberg BMI-based estimate
Enter your details to estimate body fat %.
About Body Fat Calculator
Body fat percentage estimates how much of your weight is fat mass versus lean mass. It can be more informative than weight alone for fitness tracking.
This tool uses the Deurenberg estimate based on BMI, age, and sex. It is an approximation—not a lab measurement like DEXA or BodPod.
Quick tips
- Use it for trends over time, not one-day precision
- Hydration and meal timing can affect short-term readings
- Combine with strength and circumference measurements