Calorie Calculator
Calculate your daily calorie needs using the Mifflin-St Jeor formula. Get BMR, TDEE, calories for weight loss/gain, and personalized macronutrient recommendations.
Understanding Activity Multipliers
Your TDEE is calculated by multiplying BMR by your activity level
Frequently Asked Questions
How accurate is the Mifflin-St Jeor formula?▼
The Mifflin-St Jeor formula is considered the most accurate BMR equation for the general population, with a 95% accuracy rate. It's recommended by the Academy of Nutrition and Dietetics.
Can I use this calculator for weight loss?▼
Yes! The calculator provides specific calorie targets for weight loss (subtract 300-500 calories from TDEE) and weight gain (add 300-500 calories). Always consult a professional before starting any diet.
What's the difference between BMR and RMR?▼
BMR (Basal Metabolic Rate) is measured under strict conditions including complete rest and 8+ hours of sleep. RMR (Resting Metabolic Rate) is slightly higher and easier to measure. Mifflin-St Jeor estimates BMR.
How often should I recalculate my calories?▼
Recalculate every 5-10 lbs of weight change, as your BMR changes with weight. Also recalculate if your activity level significantly changes.
Do I need to track macros or just calories?▼
Both matter for optimal health and body composition. Calories determine weight change; macros determine how you feel, perform, and what kind of weight you lose (fat vs muscle).