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BMR Basal Metabolic Rate Calculator

Calculate Resting Calorie Expenditure

Gender

Age

Weight (kg)

Height (cm)

BMR Formula (Mifflin-St Jeor)

Men: BMR = 10×kg + 6.25×cm - 5×age + 5

Women: BMR = 10×kg + 6.25×cm - 5×age - 161

Most accurate equation for most adults

BMR represents the minimum calories needed for basic life functions.

⚠ BMR is resting calories. Multiply by activity factor for TDEE (Total Daily Energy Expenditure).

What Is BMR?

BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest to maintain vital functions like breathing, circulation, cell repair, and hormone production.

Vital Functions

Breathing, circulation, temperature regulation, and brain function.

60-70% of Total

BMR is the largest component of daily calorie expenditure.

Muscle Impact

More muscle = higher BMR. Muscle burns more calories at rest.

Age Decline

BMR decreases ~1-2% per decade after 30 due to muscle loss.

Teaching Example: Male, 30yo, 70kg, 175cm. BMR=10×70+6.25×175-5×30+5=700+1093.75-150+5=1648.75 cal/day.

Applications

Weight Loss Weight Gain Diet Planning Fitness Goals Nutrition

Frequently Asked Questions

What is BMR?▼

BMR (Basal Metabolic Rate) is calories burned at complete rest, for basic life functions (breathing, circulation, cell production).

Mifflin-St Jeor formula?▼

Men: BMR=10×kg+6.25×cm-5×age+5. Women: BMR=10×kg+6.25×cm-5×age-161.

Why BMR matters?▼

BMR is ~60-70% of total daily calories. It's the foundation for weight loss/gain planning.

Factors affecting BMR?▼

Age, gender, weight, height, muscle mass, genetics, hormones, and thyroid function.

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