BMR Calculator
Calculate your Basal Metabolic Rate (BMR) to determine how many calories your body burns at rest. Use multiple proven formulas for accurate metabolic rate calculation.
Select Formula
Mifflin-St Jeor
Most accurate for most people (recommended)
Harris-Benedict
Original equation, slightly less accurate
Katch-McArdle
Requires body fat % for lean mass calculation
Basal Metabolic Rate (BMR)
Calories burned at complete rest
Metabolic Age
Compared to average for your age group
Daily Calorie Needs
Based on moderate activity level
BMR Energy Breakdown by Body Systems
How your body uses energy at rest
Liver
1,134 kcal
Brain
798 kcal
Skeletal Muscle
756 kcal
Heart
294 kcal
Kidneys
420 kcal
Other Organs
798 kcal
Daily Calorie Needs by Activity Level
Sedentary
Little or no exercise
Light Activity
Exercise 1-3 days/week
Moderate Activity
Exercise 3-5 days/week
Very Active
Exercise 6-7 days/week
Extra Active
Hard exercise & physical job
Formula Comparison
| Formula | BMR Result | Accuracy | Notes |
|---|---|---|---|
| Mifflin-St Jeor | 1,680 kcal | Highest accuracy for most | Recommended |
| Harris-Benedict | 1,725 kcal | Slightly overestimates | Original equation |
| Katch-McArdle | 1,630 kcal | Most accurate with body fat | Requires body fat % |
BMR Calculator
Title:BMR Calculator | Basal Metabolic Rate Estimator
Meta Description:Use the BMR Calculator to find how many calories your body burns at rest. Ideal for designing personalized fitness and diet plans.
Related
Body Fat Calculator | Calorie Calculator
BMR Calculator
The BMR Calculator determines your Basal Metabolic Rate – the number of calories you burn at rest. It helps in planning diets and fitness routines.
- Key Benefits: Accurate BMR estimate, Ideal for calorie planning, Helps in fitness goals
- Smart Features: Mifflin & Harris methods, Gender-specific formulas, Easy to use.
BMR Calculator - Calculate your Basal Metabolic Rate (BMR) to determine how many calories your body burns at rest. Use multiple proven formulas for accurate metabolic rate calculation.
- Personal InformationAgeGenderMaleFemaleHeightcminWeightkglbBody Fat % (optional)
- Select Formula
- Mifflin-St Jeor
- Most accurate for most people (recommended)
- Harris-Benedict
- Original equation, slightly less accurate
- Katch-McArdle
- Requires body fat % for lean mass calculationCalculate BMR
- BMR Calculator – Basal Metabolic Rate Calculator | Use for educational purposes only
A BMR calculator determines your Basal Metabolic Rate – the calories your body burns at rest. This fundamental BMR calculator helps you understand your baseline energy needs for maintaining basic bodily functions and life processes.
The BMR calculator uses established scientific formulas for precise calculations. This reliable BMR calculator employs Harris-Benedict, Mifflin-St Jeor, and other validated equations to provide accurate metabolic rate estimates for your specific characteristics.
Our comprehensive BMR calculator includes age, gender, and body composition factors. This detailed BMR calculator accounts for how these variables affect your metabolic rate and provides personalized results for your unique physiology.
The BMR calculator forms the foundation of effective nutrition and fitness planning. This essential BMR calculator helps determine appropriate calorie intake for weight management goals and optimal health maintenance.
Healthcare professionals use our BMR calculator for patient consultations. This medical-grade BMR calculator provides accurate metabolic assessments that support clinical nutrition recommendations and treatment planning.
The BMR calculator also explains factors that influence metabolic rate. This educational BMR calculator discusses how muscle mass, age, genetics, and lifestyle choices affect your body’s energy expenditure patterns.
Understand your metabolism with our precise BMR calculator. This BMR calculator gives you the metabolic insights needed to create effective diet and exercise plans tailored to your body’s specific energy requirements.
For most people, upwards of ~70% of total energy (calories) burned each day is due to upkeep. Physical activity makes up ~20% of expenditure and ~10% is used for the digestion of food, also known as thermogenesis.
The BMR is measured under very restrictive circumstances while awake. An accurate BMR measurement requires that a person’s sympathetic nervous system is inactive, which means the person must be completely rested.
Of these equations, the Mifflin-St Jeor Equation is considered the most accurate equation for calculating BMR with the exception that the Katch-McArdle Formula can be more accurate for people who are leaner and know their body fat percentage. You can pick the equation to be used in the calculation by expanding the settings.
A calculated BMR and thus TDEE may result in unsatisfactory results because of their rough estimates, but maintaining a daily journal of exercise, food consumption, etc., can help track the factors that lead to any given results and help determine what works, as well as what needs to be improved upon.