Calculator

Body & Weight Calculators

Weight (kg): Height (cm): Age: Gender: Male Female Waist Circumference (cm): Hip Circumference (cm): Body Fat %: Height (inches):

📘 How to Interpret Your Results

• Body Mass Index (BMI): Estimates body fat based on weight and height.
  Under 18.5: Underweight | 18.5–24.9: Normal | 25–29.9: Overweight | 30+: Obese
• Body Surface Area (BSA): Total skin area of your body; used in medical dosing.
  Normal adult range: 1.6–2.0 m²
• Ponderal Index (PI): Similar to BMI but more accurate for tall or short individuals.
  Healthy: 12–15 (varies by build)
• Lean Body Mass (LBM): Your body weight minus fat (muscle, organs, bones, water).
  Higher is better for athletes and strength goals.
• Fat-Free Mass Index (FFMI): LBM adjusted for height; used by fitness experts.
  Above 19: Fit | Above 22: Very muscular
• Fat Mass (FM): The total weight of fat in your body.
  Helps estimate ideal fat-loss targets.
• Basal Metabolic Rate (BMR): Calories your body burns at rest.
  Use to estimate daily calorie needs (multiply by 1.2–1.9 based on activity).
• Ideal Body Weight (IBW): Theoretical optimal weight based on height and gender.
  Not strict, but helpful for target setting.
• Waist-to-Hip Ratio (WHR): Fat distribution; related to heart disease risk.
  Men: < 0.90 | Women: < 0.85 is considered low risk.
• Waist-to-Height Ratio (WHtR): Fat distribution and cardiovascular risk.
  Healthy: Keep waist less than half your height (WHtR < 0.5).
• Body Adiposity Index (BAI): Fat % based on hip size and height.
  Rough estimate when fat % is not known. Useful without weight info.
• Relative Fat Mass (RFM): Newer method to estimate body fat using waist and height.
  More accurate than BMI in many cases. Ideal: Men: 6–24%, Women: 14–31%