Body Composition Calculator

  • Body Fat Percentage Calculator (BMI Method)
    Estimate your body fat percentage from BMI, age and sex using the Deurenberg equation. Free, instant calculator with fat mass and lean mass results.
  • Fat-Free Mass Index (FFMI) Calculator
    Calculate your Fat-Free Mass Index (FFMI) and normalized FFMI from weight, height, and body fat percentage to gauge muscle mass.
  • Dog Ideal Weight Calculator
    Estimate your dog's ideal body weight from its current weight and Body Condition Score (1-9). See how much weight to lose or gain for a healthy target.
  • Body Fat Mass & Fat-Free Mass Calculator
    Calculate your fat mass and fat-free (lean) mass from your body weight and body fat percentage. Works in kg or lb with instant, accurate results.
  • FFMI Calculator
    Calculate your Fat-Free Mass Index (FFMI) and height-adjusted FFMI from weight, height, and body fat percentage to gauge muscle mass.
  • Wilks Calculator
    Calculate your Wilks score from bodyweight and total lifted (kg). Uses the original Wilks coefficient formula for fair powerlifting comparison.
  • Ideal Body Weight at BMI 22 Calculator
    Calculate your ideal (standard) body weight at a BMI of 22 from your height. BMI 22 is the Japanese standard-weight target linked to lowest disease risk.
  • Weight Loss Calculator
    Estimate how fast you'll lose weight from your daily calorie deficit. Enter your TDEE and intake to get kg and lb lost per week and month.
  • Pet BCS (Body Condition Score) Calculator
    Map your dog or cat's body condition to a 5-point BCS, obesity level and approximate body-fat range. Based on Japan's Ministry of the Environment pet guide.
  • Ideal and Beauty Weight Table Calculator
    Calculate your ideal weight (BMI 22) and beauty weight (BMI 20) from your height, plus a full reference table from 140 to 200 cm.
  • BMI to Weight Conversion Calculator
    Back-calculate body weight from a target BMI and height. Enter a BMI and height in cm to get the matching weight in kg/lb, plus a full height-vs-weight table.
  • Child Height Prediction Calculator
    Predict a child's adult height from the parents' heights using the mid-parental (target-height) formula. Enter father and mother height in cm.
  • Body Frame Size Calculator
    Find your body frame size (small, medium or large) from your height and wrist circumference using the classic height-to-wrist ratio method.
  • BMI Weight Loss Calculator
    Calculate your current BMI, target weight for a goal BMI, and exactly how many kilograms you need to lose to get there.
  • Birth Weight Percentile Calculator
    Calculate a newborn's birth weight percentile and z-score for gestational age and sex using normal-distribution reference values.
  • Height Percentile Calculator
    Find your height percentile from a normal distribution. Enter height, gender or custom mean/SD to see what % of people you are taller than. US defaults.
  • Baby Percentile Calculator
    Calculate your baby's growth percentile (weight, length, head circumference) from LMS reference values using the WHO/CDC Box-Cox z-score method.
  • Sock Size Calculator
    Convert your US shoe size to the right sock size. Enter men's or women's shoe size to get the matching small/medium/large sock range.
  • Jeans Size Calculator
    Find your jeans size from waist and inseam measurements. Get your W x L (US/UK) plus the approximate EU waist size in inches or centimeters.
  • Jacket Size Calculator
    Convert your chest measurement to a US/UK and EU jacket size. Enter chest in inches or cm to find your suit, blazer, or coat size instantly.
  • Hat Size Calculator
    Convert your head circumference (inches or cm) into a US fitted hat size and EU size instantly. US size = circumference ÷ π, rounded to 1/8.
  • Dress Size Calculator
    Estimate your dress size from bust, waist and hip measurements. Get approximate US, UK and EU sizes in inches or centimeters instantly.
  • Glove Size Calculator
    Find your glove size from your hand circumference in inches or cm. Get numeric and letter (XS–XXL) sizes instantly with this free calculator.
  • Bikini Size Calculator
    Estimate your bikini and bra size from underbust and bust measurements in cm. Get your band number and cup letter instantly with our free calculator.

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