Body Composition Calculator

  • Dog Size Calculator
    Estimate your puppy's adult weight and size category (small, medium, large) from current weight and age in weeks. Free, fast puppy growth estimator.
  • Jackson-Pollock Caliper Body Fat Calculator
    Estimate body fat percentage from 3 skinfold caliper measurements using the Jackson-Pollock equations and the Siri density conversion. Free and universal.
  • Body Surface Area (BSA) Calculator
    Calculate body surface area (BSA) in m2 from height and weight using the Du Bois, Shintani, and Fujimoto regression formulas. Supports cm/m/inch and kg/lb.
  • Waist-to-Hip Ratio (Apple vs Pear Body Type) Calculator
    Compute your waist-to-hip ratio (WHR) from waist and hip circumference and find out whether your body is apple-shaped or pear-shaped, using sex-specific thresholds.
  • Total Body Water Calculator
    Estimate your total body water (TBW) in liters from your weight and gender using the simple percentage-of-body-weight method.
  • Pediatric Blood Volume Calculator
    Estimate pediatric blood volume (EBV) from body weight using age-based mL/kg factors for premature neonates, infants, children and adolescents.
  • Blood Volume Calculator
    Estimate total blood volume from body weight using mL/kg factors for adult males, females, children and infants. Get results in mL and liters.
  • Geriatric BMI Calculator
    Calculate BMI for older adults using elderly-adjusted ranges where a normal healthy BMI is 23–30 kg/m². Enter weight and height to classify.
  • Overweight Calculator
    Calculate how many kilograms you are above the upper-normal weight (BMI 25) for your height, plus your current BMI.
  • U.S. Navy Body Fat Calculator
    Estimate body fat percentage with the U.S. Navy circumference method using height, neck, waist (and hip for women) in inches.
  • Gastric Sleeve Weight Loss Calculator
    Estimate weight loss after gastric sleeve surgery from your current weight, ideal weight and expected % excess weight loss (%EWL). Free, instant.
  • Waist to Height Ratio Calculator
    Calculate your waist-to-height ratio (WHtR) instantly. Enter waist and height in cm or inches to gauge central fat and health risk. Free WHtR tool.
  • Weight Loss Percentage Calculator
    Calculate what percentage of body weight you've lost. Enter your starting and current weight to see your weight loss percentage instantly.
  • Skinfold Body Fat Calculator
    Estimate body fat percentage from 3 skinfold measurements using the Jackson-Pollock equations for men and women. Free, instant results.
  • Ponderal Index Calculator
    Calculate your Ponderal Index (PI) from body mass and height using PI = kg / m³. A height-adjusted body composition index, useful for tall or short people.
  • Bedridden Patient Height Calculator
    Estimate height for bedridden or non-ambulatory patients from knee height and age using the Chumlea equations. Works for males and females.
  • ABSI (A Body Shape Index) Calculator
    Calculate your ABSI (A Body Shape Index) from waist, height and weight. Estimates abdominal fat risk independent of BMI. Free and instant.
  • Height in Inches Calculator
    Convert your height from feet and inches into total inches instantly. Enter feet and inches to get the total height in inches plus centimeters.
  • Cat BMI Calculator
    Calculate your cat's Body Mass Index (BMI) from weight and body length. A quick general indicator of feline body condition using BMI = kg / m².
  • Dog BMI Calculator
    Calculate your dog's BMI from weight and body length. Enter kilograms and centimeters to get a body mass index proxy (kg/m²) for any breed.
  • Waist-to-Hip Ratio Calculator
    Calculate your waist-to-hip ratio (WHR) instantly. Divide waist by hip circumference to assess body fat distribution and health risk by gender.
  • BMI Prime Calculator
    Calculate your BMI Prime, the ratio of your BMI to the upper normal limit of 25. Enter weight and height to see your number instantly.
  • Ideal Body Weight Calculator
    Calculate your ideal body weight based on height and gender. Enter your height in centimeters or inches and select male or female for personalized results with this accurate ideal body weight calculator.
  • Adjusted Body Weight Calculator
    Calculate Adjusted Body Weight (ABW) quickly and accurately. Ideal for medical and nutritional use, this tool helps adjust dosages and dietary needs.

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