What does this Body Health Calculator measure?

It calculates BMI, BMR and TDEE, plus optional body composition metrics like body fat %, WHR (waist-to-hip) and WHtR (waist-to-height).

What measurements are required vs optional?

Height, weight, age and gender are required. Waist/neck (and hip for women) are optional and unlock body fat %, WHR and WHtR.

How is body fat percentage estimated?

It uses the US Navy tape method based on height and circumferences (waist/neck, and hip for women).

How are BMR and TDEE calculated?

BMR is estimated using the Mifflin–St Jeor equation; TDEE is BMR multiplied by your selected activity factor.

How is the ideal weight range computed?

It combines multiple formulas (Robinson and Miller) and also shows the BMI-based healthy range (BMI 18.5–24.9).

No. All calculations run locally in your browser.

Body Health Calculator – Free Online Tool

Basic Information

Gender

Age (years)

Height (cm)

Weight (kg)

Optional Measurements

Add waist, hip, or neck data to unlock advanced body fat metrics.

Waist Circumference (cm)

Hip Circumference (cm)

Neck Circumference (cm)

Activity Level

Understanding These Metrics

BMI

Most common health screening tool. Uses weight and height to categorize underweight (<18.5), normal (18.5-24.9), overweight (25-29.9), or obese (≥30).

BMR/TDEE

BMR is calories your body burns at rest. TDEE includes activity level. Used for weight management and diet planning.

Body Fat %

More accurate than BMI for fitness. Essential fat: 2-5% (men), 10-13% (women). Athletes: 6-13% (men), 14-20% (women).

WHR

Measures body fat distribution. Higher values indicate more abdominal fat, linked to health risks. Target: <0.9 (men), <0.8 (women).

Body Health Calculator

Basic Information

Optional Measurements

Your Body Metrics

BMI

BMR / TDEE

Body Fat %

WHR

WHtR

Ideal Weight Range

Understanding These Metrics

BMI

BMR/TDEE

Body Fat %

WHR

Body Health Calculator