How is BMR calculated?

This calculator uses the Mifflin-St Jeor Equation, which is considered the most accurate BMR formula. For men: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age(y) + 5. For women: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age(y) - 161.

What factors affect BMR?

BMR is influenced by age, gender, weight, height, body composition, genetics, and hormonal factors. Muscle mass increases BMR while fat tissue requires less energy. BMR typically decreases with age and is generally higher in men than women.

How accurate is the Mifflin-St Jeor equation?

The Mifflin-St Jeor equation is considered the most accurate for estimating BMR in healthy individuals, with about 80% accuracy for most people. However, it's still an estimate and individual variations can occur based on factors like body composition and metabolic health.

BMR & Calorie Calculator - Calculate Your Metabolic Rate

Gender

Age (years)

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Height (cm)

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Weight (kg)

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Activity Level

Basal Metabolic Rate

Calories at complete rest

Maintenance Calories

Calories to maintain weight

Weight Loss Calories

500 calorie deficit per day

Weight Gain Calories

500 calorie surplus per day

Calorie Needs Visualization

Understanding Basal Metabolic Rate (BMR)

Your Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, and cell production while at complete rest. It represents the minimum energy required to keep your body functioning.

The Mifflin-St Jeor Equation

This calculator uses the Mifflin-St Jeor Equation, which is considered the most accurate formula for estimating BMR:

For men: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age(y) + 5
For women: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age(y) - 161

Factors Affecting Your Metabolic Rate

Several factors influence your BMR and overall metabolic rate:

Body composition: Muscle tissue burns more calories than fat tissue
Age: Metabolism typically slows with age
Gender: Men usually have higher BMR due to more muscle mass
Hormonal factors: Thyroid function and other hormones affect metabolism
Genetic factors: Some people naturally have faster or slower metabolisms

Frequently Asked Questions

What is Basal Metabolic Rate (BMR)?: Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, and cell production while at complete rest. It represents the minimum energy required to keep your body functioning.
How is BMR calculated?: This calculator uses the Mifflin-St Jeor Equation, which is considered the most accurate BMR formula. For men: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age(y) + 5. For women: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age(y) - 161.
What factors affect BMR?: BMR is influenced by age, gender, weight, height, body composition, genetics, and hormonal factors. Muscle mass increases BMR while fat tissue requires less energy. BMR typically decreases with age and is generally higher in men than women.
How accurate is the Mifflin-St Jeor equation?: The Mifflin-St Jeor equation is considered the most accurate for estimating BMR in healthy individuals, with about 80% accuracy for most people. However, it's still an estimate and individual variations can occur based on factors like body composition and metabolic health.

Medical Disclaimer: This calculator provides estimates only and should not be used as a substitute for professional medical advice. Always consult with a healthcare provider before making any health-related decisions. This tool follows general guidelines but may not account for individual variations. Results are based on statistical averages and should be interpreted as general guidance rather than definitive medical assessment.