Yes, BMR generally decreases with age as muscle mass tends to decline and metabolism slows.

BMR Calculator - Health Management

Q: Can I increase my BMR?

Building lean muscle, staying active, eating enough protein, and getting adequate sleep can help support a higher BMR.

Q: Does gender affect BMR?

Yes, men generally have a higher BMR than women due to typically greater lean muscle mass.

Q: Can I use BMR for weight loss?

Yes, BMR is the starting point for estimating daily calorie needs and planning a calorie deficit.

Q: Is this BMR calculator accurate?

This calculator uses established scientific equations, though actual needs may vary by individual.

Q: Why is BMR important?

Knowing your BMR helps estimate daily calorie requirements and build an effective nutrition or fitness plan.

Q: Should I calculate BMR or TDEE?

BMR is the foundation. Calculate TDEE after finding your BMR to estimate total daily calorie needs.

🔥 Calculate Your BMR

Gender

Height (cm)

Weight (kg)

Age (Years)

Formula

What Is BMR?

Basal Metabolic Rate (BMR) is the number of calories your body burns every day while at complete rest. It represents the minimum amount of energy needed to keep essential body functions working, including breathing, blood circulation, brain activity, and maintaining body temperature.

Your BMR does not include calories burned through walking, exercise, or daily activities. It only reflects the energy required for basic life-sustaining functions.

How This Calculator Works

Enter your age, gender, height, and weight. This calculator estimates your Basal Metabolic Rate using either the recommended Mifflin-St Jeor equation or the Harris-Benedict equation. The result shows approximately how many calories your body needs each day while resting.

The BMR Formula

Formula	Equation
Mifflin-St Jeor (Men)	10 × Weight + 6.25 × Height − 5 × Age + 5
Mifflin-St Jeor (Women)	10 × Weight + 6.25 × Height − 5 × Age − 161
Harris-Benedict (Men)	88.362 + (13.397 × Weight) + (4.799 × Height) − (5.677 × Age)
Harris-Benedict (Women)	447.593 + (9.247 × Weight) + (3.098 × Height) − (4.330 × Age)

Example Calculation

A 30-year-old male with a height of 175 cm and weight of 70 kg has an estimated BMR of approximately 1,649 calories per day using the Mifflin-St Jeor equation (or roughly 1,696 using Harris-Benedict). This means his body requires around this many calories daily to maintain essential functions while at rest.

Factors That Affect BMR

Age
Gender
Height
Body weight
Lean muscle mass
Hormone levels
Genetics
Health conditions

BMR vs TDEE

BMR	TDEE
Calories burned at complete rest.	Total calories burned throughout the day.
Does not include physical activity.	Includes work, walking, exercise, and daily movement.
Starting point for calorie planning.	Used to estimate daily calorie requirements.

💡 Good to Know Your BMR is only one part of your daily calorie needs. To estimate how many calories you actually burn in a day, multiply your BMR by your activity level to calculate your Total Daily Energy Expenditure (TDEE) — try our TDEE Calculator for that.

Why Knowing Your BMR Matters

Helps estimate daily calorie requirements
Useful for weight loss and weight gain planning
Supports meal planning and nutrition goals
Provides a foundation for calculating TDEE
Helps track metabolic changes over time

⚠️ Medical Disclaimer This calculator provides an estimate for educational purposes only. Individual calorie needs vary depending on body composition, health conditions, and lifestyle. Always consult a qualified healthcare professional for personalised nutrition advice.

Frequently Asked Questions

What is BMR?+

Basal Metabolic Rate (BMR) is the number of calories your body needs each day to perform essential functions such as breathing, circulation, and maintaining body temperature while at complete rest.

Is BMR the same as TDEE?+

No. BMR measures calories burned at rest, while TDEE includes calories burned through physical activity, exercise, and daily movement.

Which BMR formula is more accurate?+

The Mifflin-St Jeor equation is generally considered more accurate for estimating BMR in healthy adults, while the Harris-Benedict equation remains widely used.

Can I increase my BMR?+

Building lean muscle, staying physically active, eating enough protein, getting adequate sleep, and maintaining a healthy lifestyle can help support a higher BMR.

Does age affect BMR?+

Yes. BMR generally decreases with age because muscle mass tends to decline and metabolism slows over time.

Does gender affect BMR?+

Yes. Men generally have a higher BMR than women because they usually have more lean muscle mass.

Can I use BMR for weight loss?+

Yes. Your BMR is the starting point for estimating daily calorie needs and planning a calorie deficit for weight loss.

Is this BMR calculator accurate?+

This calculator provides an estimate using established scientific equations. Actual calorie needs may vary depending on body composition, health conditions, and lifestyle.

Why is BMR important?+

Knowing your BMR helps you estimate daily calorie requirements, manage body weight, and build an effective nutrition or fitness plan.

Should I calculate BMR or TDEE?+

BMR is the foundation. If you want to estimate your total daily calorie needs, calculate your TDEE after finding your BMR.

What Is BMR?

How This Calculator Works

The BMR Formula

Example Calculation

Factors That Affect BMR

BMR vs TDEE

Why Knowing Your BMR Matters

Related Calculators

Frequently Asked Questions

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