BMR & TDEE Calculator – Mifflin-St Jeor

Calculate BMR and total daily energy expenditure using Mifflin-St Jeor equation.

Weight (kg) (kg)

Height (cm) (cm)

Age (years) (years)

Sex

Activity level

Please check your inputs and try again.

Worked Examples

Example 1: 30yo male, 70kg, 175cm, moderately active

BMR=1696, TDEE=1696×1.55

Result: 2,629 kcal/day TDEE

Maintenance calories for moderate exercise

Example 2: 45yo female, 60kg, 162cm, sedentary

BMR=1322, TDEE=1322×1.2

Result: 1,586 kcal/day

Typical sedentary adult female TDEE

Frequently Asked Questions

Mifflin-St Jeor vs Harris-Benedict?

Mifflin-St Jeor (1990) is more accurate for modern populations — validated as the best single equation in multiple meta-analyses. Harris-Benedict (1919) overestimates by 5-15% in many individuals.

What is the minimum safe caloric intake?

Generally 1200 kcal/day for women and 1500 kcal/day for men is considered a minimum for adequate nutrition without medical supervision. Very low calorie diets (<800 kcal) should be medically supervised.