Free calculators for body composition

Know your real health numbers

WHtR — Waist-to-Height Ratio · BMI — Body Mass Index · TDEE — Total Daily Energy Expenditure · BMR — Basal Metabolic Rate · WHR — Waist-to-Hip Ratio · BRI — Body Roundness Index · Body Fat % · Macros · Calorie Deficit · Ideal Body Weight · Lean Body Mass · Water Intake

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Medical disclaimer: All calculators provide general estimates for informational purposes only — they are not medical advice, diagnosis, or treatment recommendations. Always consult a qualified healthcare professional before making changes to your diet, exercise, or health management. Read full disclaimer & terms →

WHtR Calculator

cm
cm
Your WHtR
0.49
Healthy

Your waist is less than half your height — a strong health indicator.

ℹ️

WHtR is a screening indicator, not a diagnosis. Results may not be accurate for pregnant individuals, children under 5, or those with certain medical conditions. Always consult a healthcare professional.

0.340.50 target0.57+
WHtR ✓
  • Fat distribution
  • All ethnicities
  • No scale needed
  • Kids & adults
BMI limits
  • Ignores fat location
  • Misleads muscle
  • 200yr old formula
  • Over-simplifies

All Health Tools

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WHtR Calculator
Waist-to-height ratio — a key indicator of cardiovascular and metabolic risk
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BMI Calculator
Body Mass Index — the classic weight screening tool
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TDEE / BMR
Total daily energy expenditure and basal metabolic rate
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Waist-to-Hip Ratio
Apple vs pear shape — WHO cardiovascular risk indicator
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Body Fat %
U.S. Navy method body fat percentage estimate
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Body Roundness Index
BRI — an emerging metric for central adiposity and health risk
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Ideal Body Weight
Evidence-based formulas for healthy weight ranges by height and sex
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Lean Body Mass
Estimate your fat-free mass — muscle, bone, water, and organs
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Macro Calculator
Protein, carbs, and fat split for your daily calories
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Calorie Deficit
Safe calorie targets for gradual, sustainable weight loss
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Water Intake
Daily hydration needs based on weight, activity, and climate
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Learn

Evidence-based insights
Research 6 min

WHtR vs BMI: Which Predicts Health Risk Better?

Growing research shows WHtR outperforms BMI for cardiovascular disease, diabetes, and metabolic syndrome.

Read more →
Guide 4 min

How to Measure Your Waist Correctly

Accurate measurement is everything. Learn exactly where and how to measure for reliable results.

Read more →
Science 8 min

Why Visceral Fat Is the Real Danger

Not all fat is equal. Abdominal visceral fat drives inflammation and disease.

Read more →
New Metric 5 min

Body Roundness Index: Next Evolution?

BRI is gaining traction as another body composition metric. How does it compare?

Read more →
Nutrition 7 min

Understanding TDEE: Your True Calorie Needs

Total Daily Energy Expenditure goes beyond BMR to account for your actual lifestyle.

Read more →
Children 5 min

Screening Children's Health with WHtR

Research shows WHtR can identify at-risk children as early as age five.

Read more →

The simple rule

Keep your waist under half your height

A tape measure and five seconds — that's all you need to check one of the strongest predictors of cardiovascular health.