BMR Calculator
Calculate your Basal Metabolic Rate and daily calorie needs using the Mifflin-St Jeor formula.
1,649
BMR (calories/day at rest)
1,979
Daily Calories (with activity)
How This Works
BMR is the number of calories your body needs to maintain basic functions like breathing and circulation while completely at rest. Multiplying it by an activity factor gives your Total Daily Energy Expenditure (TDEE) — a starting point for weight maintenance, loss, or gain goals.
Formula (Mifflin-St Jeor)
Men: BMR = 10 × Weight(kg) + 6.25 × Height(cm) - 5 × Age + 5
Women: BMR = 10 × Weight(kg) + 6.25 × Height(cm) - 5 × Age - 161
Women: BMR = 10 × Weight(kg) + 6.25 × Height(cm) - 5 × Age - 161
Frequently Asked Questions
What is the BMR for a 30-year-old man weighing 70kg?
1,649 calories per day at complete rest.
What's the difference between BMR and TDEE?
BMR is calories burned at total rest. TDEE (Total Daily Energy Expenditure) adds your activity level on top, giving a more realistic daily calorie target.