Body Metrics & Nutrition

BMI, BMR (basal metabolic rate), body surface area, and total daily energy expenditure.

Body Mass Index (BMI)

weight in kg, height in metres. Normal range: 18.5–24.9.

BMI = \frac{weight}{height^2}

BMR (Mifflin-St Jeor)

w = weight in kg, h = height in cm, a = age in years, s = +5 (male) or −161 (female).

BMR = 10 \cdot w + 6.25 \cdot h - 5 \cdot a + s

Body Surface Area (Mosteller)

height in cm, weight in kg. Result in m². Used for chemotherapy dosing.

BSA = \sqrt{\frac{height \cdot weight}{3600}}

Total Daily Energy Expenditure (TDEE)

PAL = Physical Activity Level (1.2 sedentary → 1.9 very active).

TDEE = BMR \cdot PAL

Can't find what you're looking for?

Our tool can generate any formula instantly based on your description or image. Just describe or show what you need.