Basal Metabolic Rate Calculator

🔥 What is Basal Metabolic Rate (BMR)?

Basal Metabolic Rate (BMR) refers to the minimum number of calories your body requires to maintain basic physiological functions at rest — including breathing, blood circulation, cellular production and temperature regulation. Understanding your BMR is essential for managing weight, optimizing nutrition and tailoring physical activity.

🧠 Why Should You Calculate Your BMR?

Knowing your BMR helps you:

Estimate your daily caloric needs
Develop personalized nutrition and fitness plans
Understand the foundation of energy balance
Set realistic weight loss or muscle gain targets

It’s especially important for those managing obesity, chronic conditions or pursuing athletic performance.

Basal Metabolic Rate Calculator

🔥 Basal Metabolic Rate (BMR) Calculator

Gender:

Age:

Height (cm):

Weight (kg):

Select Formula:

ℹ️ Formula Information:

Mifflin-St Jeor Formula: Considered more accurate and modern. It calculates your calorie needs at rest using recent data and is widely used by nutrition professionals.

Harris-Benedict Formula: A classic formula developed in 1918. It estimates BMR based on age, height, weight, and gender. Though still used, it may be slightly less precise compared to newer methods.

🧮 How Does This BMR Calculator Work?

At Ask Asclepios, our tool provides two scientifically validated formulas you can choose from:

1. Mifflin-St Jeor Equation (modern & widely accepted)

Men: BMR = 10 × weight (kg) + 6.25 × height (cm) – 5 × age (years) + 5
Women: BMR = 10 × weight (kg) + 6.25 × height (cm) – 5 × age (years) – 161

This formula is considered highly accurate for most adults.

2. Harris-Benedict Equation (classic approach)

Men: BMR = 66.5 + 13.75 × weight (kg) + 5.003 × height (cm) – 6.775 × age (years)
Women: BMR = 655.1 + 9.563 × weight (kg) + 1.850 × height (cm) – 4.676 × age (years)

Though older, it remains relevant in clinical and academic settings.

⚙️ How to Use the Tool

Enter your age, gender, weight (kg) and height (cm)
Select which formula you’d like to use
Click “Calculate” to view your BMR
Learn how many calories you need to survive — before considering activity or exercise

👉 This value represents resting energy expenditure. It does not include energy burned during movement, digestion or exercise.