fire Calorie Calculator
Estimate your daily calorie needs based on your personal stats and activity level. Get macronutrient breakdowns to support your fitness and nutrition goals.
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Frequently Asked Questions - Calorie Calculator
What is BMR and how is it different from TDEE?
BMR (Basal Metabolic Rate) is the calories your body burns at complete rest to maintain basic functions. TDEE (Total Daily Energy Expenditure) is your BMR multiplied by an activity factor, representing the total calories you burn in a day including all activities.
How accurate is the Mifflin-St Jeor equation used in this calculator?
The Mifflin-St Jeor equation is considered the most accurate BMR formula for the general population, with an error rate of about 10%. Individual variations in muscle mass, hormones, and metabolism mean actual BMR can differ. This is an estimate, not a precise measurement.
How many calories should I eat to lose weight?
A safe and sustainable target is a 500-calorie daily deficit, which results in about 0.5 kg (1 lb) of fat loss per week. Do not go below 1,200 calories for women or 1,500 for men without medical supervision, as this can lead to nutrient deficiencies.
What macronutrient split is best for weight loss?
The best split is one you can sustain long-term. A common starting point is 30% protein, 35% carbs, 35% fat. Higher protein helps preserve muscle during weight loss. Adjust based on your preferences, activity type, and how your body responds.
Why does muscle mass affect calorie burn?
Muscle tissue is metabolically active, burning calories even at rest. Each pound of muscle burns about 6-10 calories per day versus 2-4 calories for fat. This is why strength training and maintaining muscle mass are important for long-term weight management.
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