BMR Calculator
Calculate your basal metabolic rate and discover how many calories your body burns at rest every day
Calculate Your BMR Now
How to Use the BMR Calculator
Enter Your Personal Details
Input your age in years, weight in kilograms, and height in centimeters into the calculator fields.
Select Your Gender
Choose either Male or Female from the dropdown menu, as BMR calculations differ by gender.
Click Calculate
Press the 'Calculate BMR' button to instantly compute your basal metabolic rate.
Review Your Results
See your BMR in calories, daily TDEE estimates, and weekly calorie burn calculations.
Compare Formulas
View results from both Harris-Benedict and Mifflin-St Jeor formulas for comparison.
Key Features
Instant Results
Get your BMR calculation in milliseconds with no waiting or processing delays.
Dual Formula Comparison
Compare Harris-Benedict and Mifflin-St Jeor formulas to see which suits you best.
100% Private
All calculations happen in your browser. Your data is never stored or transmitted anywhere.
Mobile Friendly
Works perfectly on smartphones, tablets, and desktop computers with responsive design.
TDEE Estimates
Calculate daily calorie burn at different activity levels for better fitness planning.
Scientifically Validated
Uses proven metabolic formulas trusted by nutritionists and fitness professionals.
How BMR is Calculated
The BMR calculator uses two scientifically validated formulas to estimate your basal metabolic rate. Both formulas account for age, weight, height, and gender to provide accurate calorie burn estimates.
For Men: BMR = 88.362 + (13.397 × weight) + (4.799 × height) − (5.677 × age)
For Women: BMR = 447.593 + (9.247 × weight) + (3.098 × height) − (4.330 × age)
For Men: BMR = (10 × weight) + (6.25 × height) − (5 × age) + 5
For Women: BMR = (10 × weight) + (6.25 × height) − (5 × age) − 161
Why Two Formulas? The Mifflin-St Jeor formula is newer and more accurate for modern populations, while Harris-Benedict is older but still widely used. Most people fall within 50-100 calories of both results. The average of both provides a reliable estimate.
Real-World Examples
Raj is a 28-year-old male, weighs 75 kg, and is 178 cm tall. He works in IT and wants to know his daily calorie needs.
Mifflin-St Jeor BMR: 1,760 kcal/day
Average BMR: 1,770 kcal/day
Priya is a 35-year-old female, weighs 62 kg, and is 162 cm tall. She's training for a 5K run and tracking calorie intake.
Mifflin-St Jeor BMR: 1,425 kcal/day
Average BMR: 1,418 kcal/day
Sarah is a 42-year-old female, weighs 68 kg, and is 168 cm tall. She's starting a fitness program and wants baseline calorie data.
Mifflin-St Jeor BMR: 1,478 kcal/day
Average BMR: 1,506 kcal/day
What is Basal Metabolic Rate (BMR)?
Basal Metabolic Rate (BMR) is the number of calories your body burns at rest to maintain essential physiological functions. These include breathing, circulation, cell production, nutrient processing, and maintaining body temperature. BMR accounts for about 60-75% of total daily calorie burn in sedentary individuals.
Unlike TDEE (Total Daily Energy Expenditure) which includes exercise and daily activities, BMR specifically measures the minimum energy required just to keep your body functioning. Understanding your BMR is crucial for setting realistic nutrition and fitness goals, whether you're aiming to lose weight, maintain your current weight, or build muscle.
BMR varies significantly between individuals based on age, gender, weight, height, and especially muscle mass. A person with more muscle tissue naturally has a higher BMR because muscle tissue is metabolically active even at rest. This is why strength training and muscle building can increase BMR over time.
BMR Across Languages & Cultures
🇮🇳 Hindi (भारतीय)
आधारभूत चयापचय दर (BMR): आपके शरीर द्वारा विश्राम की स्थिति में जलाई जाने वाली कैलोरी की संख्या। मांसपेशियों में अधिक ऊतक होने से BMR अधिक होता है।
🇮🇳 Tamil (தமிழ்)
அடிப்படை வளர்ச்சிதை வீதம் (BMR): உங்கள் உடல் ஓய்வெடுக்கும் போது எரிக்கும் கலோரிகளின் எண்ணிக்கை। தசை திசு அதிக BMR வை குறிக்கிறது.
🇮🇳 Telugu (తెలుగు)
ప్రాధమిక జీవక చయాపచయ రేటు (BMR): మీ శరీరం విశ్రాంతి సమయంలో కాలిబిట్టే క్యాలరీల సంఖ్య। కండరాల కణజాలం ఎక్కువ BMRని సూచిస్తుంది.
🇮🇳 Bengali (বাংলা)
মৌলিক বিপাকীয় হার (BMR): বিশ্রামের সময় আপনার শরীর যে ক্যালোরি পোড়ায় তার সংখ্যা। পেশী টিস্যু বেশি BMR নির্দেশ করে।
🇮🇳 Marathi (मराठी)
आधारभूत चयापचय दर (BMR): विश्राम अवस्थेत आपल्या शरीराने जाळलेल्या कॅलोरीजची संख्या. स्नायूंच्या अधिक ऊतकामुळे BMR जास्त होता.
🇮🇳 Gujarati (ગુજરાતી)
મૂળભૂત ચયાપચય દર (BMR): વિશ્રામ સમયે તમારું શરીર બાળી નાખે છે તે કેલોરીઝની સંખ્યા. સ્નાયુ પેશી વધુ BMR સૂચવે છે.
🇮🇳 Kannada (ಕನ್ನಡ)
ಮೂಲ ಚಯಾಪಚಯ ದರ (BMR): ವಿಶ್ರಾಂತಿಯ ಸಮಯದಲ್ಲಿ ನಿಮ್ಮ ಶರೀರವು ಸುಡುವ ಕ್ಯಾಲೋರಿಗಳ ಸಂಖ್ಯೆ. ಸ್नायು ಅಂಗಾಂಶ ಹೆಚ್ಚಿನ BMR ಅನ್ನು ಸೂಚಿಸುತ್ತದೆ.
🇮🇳 Malayalam (മലയാളം)
അടിസ്ഥാന മെറ്റബോളിക് നിരക്ക് (BMR): വിശ്രമിക്കുന്ന സമയത്ത് നിങ്ങളുടെ ശരീരം ജ്വലിപ്പിക്കുന്ന കലോരി എണ്ണം. പേശി ടിഷ്യു ഉയർന്ന BMR സൂചിപ്പിക്കുന്നു.
🌍 Spanish (Español)
Tasa Metabólica Basal (BMR): Número de calorías que quema su cuerpo en reposo. Más tejido muscular indica BMR más alta.
🌍 French (Français)
Taux Métabolique de Base (BMR): Nombre de calories brûlées par votre corps au repos. Plus de tissu musculaire indique un BMR plus élevé.
🌍 German (Deutsch)
Grundumsatz (BMR): Anzahl der Kalorien, die Ihr Körper im Ruhezustand verbrennt. Mehr Muskelgewebe bedeutet einen höheren Grundumsatz.
🌍 Japanese (日本語)
基礎代謝率 (BMR): 安静時にあなたの体が燃焼するカロリー数。より多くの筋肉組織はより高いBMRを示します。
🌍 Arabic (العربية)
معدل الأيض الأساسي (BMR): عدد السعرات الحرارية التي يحرقها جسمك في حالة الراحة. المزيد من أنسجة العضلات يشير إلى BMR أعلى.
🌍 Portuguese (Português)
Taxa Metabólica Basal (BMR): Número de calorias queimadas pelo seu corpo em repouso. Mais tecido muscular indica uma BMR mais alta.
🌍 Korean (한국어)
기초 대사율 (BMR): 휴식 중에 신체가 태우는 칼로리 수. 근육 조직이 더 많으면 BMR이 더 높음을 의미합니다.
Want to Learn More?
Explore our detailed blog article on BMR, metabolism, and how to use your calorie calculations for fitness goals.
Read the Full Guide →Frequently Asked Questions
Is this tool free to use?
Yes, the BMR calculator is completely free to use with no registration, login, or subscription required. Calculate your basal metabolic rate anytime without any hidden charges.
What is BMR and why is it important?
BMR (Basal Metabolic Rate) is the number of calories your body burns at rest to maintain basic functions like breathing, circulation, and cell production. It's important because it forms the foundation for calculating your total daily calorie needs for weight management and fitness planning.
What's the difference between BMR and TDEE?
BMR is calories burned at rest, while TDEE (Total Daily Energy Expenditure) includes BMR plus calories burned from activities and exercise. This calculator shows both values so you understand your complete calorie picture.
Which formula is more accurate - Harris-Benedict or Mifflin-St Jeor?
The Mifflin-St Jeor formula is generally considered more accurate for modern populations as it was developed more recently (1990) and accounts for changes in body composition. Harris-Benedict (1919) is older but still widely used and trusted.
Can I use this calculator if I'm overweight or underweight?
Yes, this calculator works for all body types and weight ranges. However, for very obese individuals or those with significant muscle mass, results may need adjustment as standard formulas are less accurate at extreme weights or compositions.
How accurate is this BMR calculator?
The calculator uses scientifically validated formulas and results are estimates within ±10-20% of actual values. Accuracy depends on correct input of age, weight, height, and gender. Individual metabolism varies based on muscle mass, hormones, metabolism, and medical conditions.
What should I do with my BMR result?
Use your BMR to set calorie targets for weight loss, maintenance, or muscle gain. Multiply by activity level to get TDEE, then adjust intake accordingly. For weight loss, create a 300-500 calorie deficit; for muscle gain, add 300-500 calories above TDEE.
Does muscle mass affect BMR?
Yes, muscle tissue burns more calories at rest than fat tissue. People with more muscle mass have higher BMR. If you have significant muscle from resistance training, your actual BMR may be 10-15% higher than calculated.
How often should I recalculate my BMR?
Recalculate whenever your weight changes significantly (5+ kg) or after 3-6 months of regular exercise. As you age, metabolism slows about 2-5% per decade, so recalculate annually for long-term tracking and accurate targets.
Can hormones affect my BMR?
Yes, thyroid hormones, cortisol, estrogen, and testosterone all influence metabolism significantly. Conditions like hypothyroidism lower BMR, while hyperthyroidism raises it. Women's BMR fluctuates with menstrual cycles and hormonal changes.
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