health ToolUpdated 2026-09-19
BMR Calculator (Basal Metabolic Rate)
Determine how many calories your body burns at rest to maintain essential vital functions like breathing, circulation, and cell production.
Important Medical Disclaimer: This health tool is designed solely for informational, screening, and educational purposes. It does not provide medical diagnosis, treatment, or individualized clinical advice. Always consult a qualified physician or healthcare provider regarding any health condition.
Formula & Mathematical Methodology
BMR = 10W + 6.25H − 5A + s (Mifflin-St Jeor)
Where W is weight in kg, H is height in cm, A is age in years, and s is +5 for males and -161 for females.
How to Use This BMR Calculator (Basal Metabolic Rate)
- Select biological sex, enter weight in kg, height in cm, and age in years.
Step-by-Step Worked Example
Scenario: 30-year-old male, 75 kg, 180 cm
1. 10 × 75 = 750
2. 6.25 × 180 = 1,125
3. −5 × 30 = −150
4. 750 + 1,125 − 150 + 5 = 1,730 kcal/day
Final Calculated Result: 1,730 kcal/day at rest
What Does Your Result Mean?
This is the minimum energy your body requires daily without any physical activity.
Common Practical Applications:
- Dietary meal planning
- Caloric deficit structuring for weight loss
- Athletic nutrition
Important Limitations & Assumptions:
- Does not account for individual thyroid variations or body fat percentages.
Frequently Asked Questions
What is the Mifflin-St Jeor formula?
The Mifflin-St Jeor formula is widely regarded by dietitians as the most accurate clinical formula for estimating resting metabolic rate.
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