Body & Weight
Free BMI, ideal weight, body fat percentage, lean body mass and waist-hip ratio calculators. Track your body composition with science-backed tools.
10 free calculators available
Free BMI Calculator - Check Your Body Mass Index Instantly
Calculate your BMI (Body Mass Index) free online. Enter your height and weight to instantly find out if you are underweight, normal, overweight or obese. Science-backed results with health tips.
Free Ideal Weight Calculator - Find Your Perfect Weight by Height
Find your ideal body weight free using 4 scientific formulas (Hamwi, Devine, Robinson, Miller). Enter height and gender to get your healthy weight range instantly. Personalized BMI-based targets included!
Free Body Fat Calculator - Body Fat Percentage by US Navy Method
Calculate your body fat percentage free using the US Navy Method. Enter your measurements to get accurate body composition analysis, lean mass calculation and fitness category instantly!
Biological Age Calculator - Calculate Your True Age
Calculate your biological age based on lifestyle factors. Discover how your habits affect aging and get personalized recommendations to reverse biological aging.
Waist-to-Hip Ratio Calculator - Assess Your Health Risk
Calculate your waist-to-hip ratio and assess cardiovascular health risk using WHO guidelines. Enter your waist and hip measurements for an instant risk assessment.
Lean Body Mass Calculator - Calculate Your LBM
Calculate your Lean Body Mass (LBM) using Boer, James, and Hume formulas. Find out your fat-free mass, body fat percentage, and lean mass ratio.
Body Type Calculator - Ectomorph, Mesomorph or Endomorph?
Discover your body type with our free quiz. Find out if you are an Ectomorph, Mesomorph, or Endomorph and get personalized diet and exercise recommendations.
Waist-to-Height Ratio Calculator - A Better Health Predictor Than BMI
Calculate your waist-to-height ratio (WHtR) for a more accurate health risk assessment than BMI. Research shows WHtR is the best single predictor of cardiovascular and metabolic risk.
Body Water Calculator - Calculate Your Total Body Water
Calculate total body water percentage and volume using the Watson formula. Find out how much water your body contains based on age, gender, height, and weight.
Ideal Body Measurements Calculator
Calculate your ideal body measurements based on your height and body frame. Find ideal chest, waist, hips, biceps, and more using proven scientific formulas.
Body & Weight Calculators
10 body & weight calculators in this category. Each one names the formula it uses and the guideline or study the formula came from — so you can verify the math instead of trusting a black box. Calculations run in your browser; nothing you enter is sent anywhere.
Body & weight numbers are screening tools, not diagnoses. They are useful for spotting outliers and tracking changes over time, less useful for telling you what to do about a borderline result. For that, take the number to a clinician who can read it in the context of your full history.
Available Calculators
- Free BMI Calculator - Check Your Body Mass Index Instantly — Calculate your BMI (Body Mass Index) free online. Enter your height and weight to instantly find out if you are underweight, normal, overweight or obese. Science-backed results with health tips.
- Free Ideal Weight Calculator - Find Your Perfect Weight by Height — Find your ideal body weight free using 4 scientific formulas (Hamwi, Devine, Robinson, Miller). Enter height and gender to get your healthy weight range instantly. Personalized BMI-based targets included!
- Free Body Fat Calculator - Body Fat Percentage by US Navy Method — Calculate your body fat percentage free using the US Navy Method. Enter your measurements to get accurate body composition analysis, lean mass calculation and fitness category instantly!
- Biological Age Calculator - Calculate Your True Age — Calculate your biological age based on lifestyle factors. Discover how your habits affect aging and get personalized recommendations to reverse biological aging.
- Waist-to-Hip Ratio Calculator - Assess Your Health Risk — Calculate your waist-to-hip ratio and assess cardiovascular health risk using WHO guidelines. Enter your waist and hip measurements for an instant risk assessment.
- Lean Body Mass Calculator - Calculate Your LBM — Calculate your Lean Body Mass (LBM) using Boer, James, and Hume formulas. Find out your fat-free mass, body fat percentage, and lean mass ratio.
- Body Type Calculator - Ectomorph, Mesomorph or Endomorph? — Discover your body type with our free quiz. Find out if you are an Ectomorph, Mesomorph, or Endomorph and get personalized diet and exercise recommendations.
- Waist-to-Height Ratio Calculator - A Better Health Predictor Than BMI — Calculate your waist-to-height ratio (WHtR) for a more accurate health risk assessment than BMI. Research shows WHtR is the best single predictor of cardiovascular and metabolic risk.
- Body Water Calculator - Calculate Your Total Body Water — Calculate total body water percentage and volume using the Watson formula. Find out how much water your body contains based on age, gender, height, and weight.
- Ideal Body Measurements Calculator — Calculate your ideal body measurements based on your height and body frame. Find ideal chest, waist, hips, biceps, and more using proven scientific formulas.