Calculate your Basal Metabolic Rate and daily calorie needs.
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Basal Metabolic Rate (BMR) represents the number of calories your body needs to perform basic life-sustaining functions while at complete rest. Think of it as how much fuel your body burns just to stay alive.
BMR is measured under strict conditions: you must be awake, fully rested, in a neutral temperature, and not digesting food. In this state, energy is used only for essential bodily functions.
Your total daily calorie needs are estimated by multiplying your BMR by an activity factor ranging from 1.2 to 1.9, depending on your lifestyle and exercise habits.
While often used interchangeably, BMR and RMR are not identical. RMR measures calories burned at rest under less strict conditions, while BMR requires complete physiological equilibrium.
Even under laboratory conditions, studies show up to a 26% variation in metabolic rates between individuals. This means all BMR-based calorie calculations are estimates, not exact values.
Tracking food intake, exercise, and results over time is the most reliable way to fine-tune calorie needs and reach health or fitness goals.
No. BMR is calories burned at complete rest, while TDEE includes physical activity and digestion.
Mifflin-St Jeor is best for most people. Katch-McArdle is ideal if you know your body fat percentage.
Yes. Age, muscle mass, diet, hormones, and activity level all influence BMR over time.
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