Body Fat Calculator

Estimate body fat percentage using the US Navy circumference method.

How to Use This Calculator

  1. Enter your Sex.
  2. Enter your Weight (kg).
  3. Enter your Height (cm).
  4. Enter your Waist (cm).
  5. Enter your Neck (cm).
  6. Click Calculate to see instant results with a step-by-step breakdown.
  7. Use the Share button to copy a link with your inputs pre-filled.

⚠️ Results are for informational purposes only. Always verify important calculations with a qualified professional.

Protein Intake Calculator
Calculate daily protein needs based on weight, goal, and activity leve…
Macro Calculator
Calculate daily macronutrient targets (protein, carbs, fat) based on T…
Heart Rate Calculator
Calculate max heart rate and target training zones by age.…
BMR Calculator
Calculate Basal Metabolic Rate using Mifflin-St Jeor equation.…