About bmr & calorie calculator
Basal Metabolic Rate is the energy your body uses at complete rest to keep you alive: breathing, circulation and cell repair. Adding your activity level gives your daily calorie needs.
The formula
The Mifflin-St Jeor equation is a common standard: for men BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5, and for women the final constant is −161.
Activity multipliers
- Sedentary (little exercise): BMR × 1.2.
- Lightly active: × 1.375. Moderately active: × 1.55.
- Very active: × 1.725. Extra active: × 1.9.
A worked example
A 30-year-old man who is 175 cm tall and weighs 75 kg has a BMR of 10 × 75 + 6.25 × 175 − 5 × 30 + 5 = 1,699 kcal. With a moderate activity factor of 1.55, his daily need is about 2,633 kcal.
