BMR Calculator

How to Calculate Your BMR

Your Basal Metabolic Rate (BMR) is the number of calories your body burns at rest each day. This calculator uses the trusted Mifflin–St Jeor equation:

• For men: BMR = (4.536 × weight in lbs) + (15.88 × height in inches) − (5 × age) + 5
• For women: BMR = (4.536 × weight in lbs) + (15.88 × height in inches) − (5 × age) − 161

About CalculateMyBMR.com

CalculateMyBMR.com helps you understand how many calories your body burns each day — even at rest. Using the Mifflin–St Jeor formula, our free BMR calculator gives quick and accurate results to guide your health, fitness, or weight management goals.

Use your BMR to plan your daily calorie intake, set realistic fitness targets, and track your progress with confidence.

Start now at CalculateMyBMR.com

TL;DR

Your BMR tells you how many calories your body burns at rest. It’s the foundation for understanding your daily calorie needs and weight goals.

Key Takeaways

• BMR measures calories burned at rest.
• The Mifflin–St Jeor equation provides accurate results.
• Knowing your BMR helps plan your diet and workouts.
• Combine BMR with activity level for total daily calorie burn (TDEE).

Frequently Asked Questions

What is BMR?

BMR (Basal Metabolic Rate) is the number of calories your body uses to maintain vital functions while at rest.

How can I use my BMR?

Use your BMR as a baseline to estimate your total daily calorie needs and plan a calorie surplus (for muscle gain) or deficit (for weight loss).

Is the Mifflin–St Jeor equation accurate?

Yes. It’s widely accepted by nutritionists and fitness experts as one of the most reliable BMR formulas.

What affects BMR?

BMR changes with factors like age, weight, height, muscle mass, and gender.

Additional Resources

• Mifflin et al. (1990) – Predictive equation for resting energy expenditure
• Frankenfield et al. (2003) – BMI limits and body composition
• Weijs (2017) – Validity of predictive equations in adults

Health Disclaimer

The content on this website is for informational purposes only and should not replace professional medical advice. Always consult your doctor before making health or dietary changes.

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