Metabolic Health
BMR Calculator
Discover your Basal Metabolic Rate — the number of calories your body burns at complete rest just to stay alive. Understanding your BMR is the foundation of any nutrition or weight management plan.
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Result Guide
Understanding Your Result
Here's what each range means and how to interpret your number.
Low BMR
Below 1400 kcalA lower BMR means your body requires fewer calories at rest. This is common for smaller individuals or those with less muscle mass. Focus on strength training to increase your metabolic baseline over time.
Average BMR
1400–1800 kcalA typical BMR for most adults. Your total daily needs will be significantly higher once activity is factored in. Use the TDEE calculator to see your full energy expenditure.
High BMR
1800–2200 kcalA higher BMR is often seen in taller, more muscular individuals. This means you can consume more calories while maintaining your weight — an advantage for sustainable nutrition.
Very High BMR
Above 2200 kcalTypically seen in large, very muscular individuals or athletes. Your body requires substantial calories even at rest, making it easier to maintain weight but requiring careful meal planning.
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The Science Behind the Number
What is BMR?
Basal Metabolic Rate (BMR) is the number of calories your body needs to perform its most basic life-sustaining functions while at complete rest. This includes breathing, circulation, cell production, nutrient processing, and temperature regulation. BMR typically accounts for 60–70% of your total daily energy expenditure.
The Mifflin-St Jeor Equation
Our calculator uses the Mifflin-St Jeor equation, widely considered the most accurate BMR formula for the general population. For men: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5. For women: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161.
Factors That Affect BMR
BMR is influenced by age (decreases ~2% per decade after 20), sex (men typically have higher BMR due to more muscle mass), body composition (muscle burns more than fat), genetics, hormones, and even climate. Building lean muscle through resistance training is the most effective way to increase your BMR long-term.
BMR vs. TDEE
BMR is your calorie burn at rest. TDEE (Total Daily Energy Expenditure) multiplies your BMR by an activity factor to estimate your total daily calorie needs. If you want to know how many calories to eat for weight loss, maintenance, or gain, use the TDEE calculator next.
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