Basal Metabolic Rate (BMR) is the number of calories your body burns at complete rest to keep you alive — breathing, heartbeat, brain function and cell repair. It typically makes up about 60-75% of the calories you burn every day.
This is an estimate using the Mifflin-St Jeor equation. Individual needs vary based on muscle mass, genetics and health conditions. Consult a professional for medical advice.
Your BMR is the foundation of every weight goal. To lose weight you need to eat slightly below your Total Daily Energy Expenditure (TDEE = BMR × activity). To gain muscle you eat above it. To maintain, you match it.
Muscle tissue burns more calories at rest than fat — every kilogram of muscle burns about 13 extra kcal per day. This is why strength training is such a powerful tool for long-term weight management.
Once you know your BMR, multiply it by your activity factor to get your daily calorie needs (TDEE). Then add or subtract 300-500 kcal depending on your goal. A safe rate of weight loss is 0.5-1 kg per week.
Instead of guessing portion sizes, log meals with an AI tracker like Kcalibra — snap a photo of your meal and get instant calorie and macro data.
BMR estimates are guidelines. Individual needs vary. Consult a dietitian for personalized advice.
Log meals by photo, get AI analysis and stay on target with Kcalibra.
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