BMR Calculator
Calculate Basal Metabolic Rate
Frequently Asked Questions
What is BMR and why does it matter?
Basal Metabolic Rate (BMR) is the number of calories your body burns at complete rest to maintain basic functions like breathing, circulation, and cell production. It typically accounts for 60-75% of your total daily calorie expenditure.
What formula does the BMR Calculator use?
The calculator uses the Mifflin-St Jeor equation, considered the most accurate for most people. For men: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age - 161. For women, subtract 161 instead of adding 5.
How does BMR differ from TDEE?
BMR measures calories burned at rest only. TDEE (Total Daily Energy Expenditure) multiplies BMR by an activity factor: sedentary (×1.2), light exercise (×1.375), moderate (×1.55), very active (×1.725), extra active (×1.9).
What factors affect my BMR?
Key factors include age (BMR decreases ~2% per decade after 20), muscle mass (more muscle = higher BMR), gender (men typically have higher BMR), height, weight, and genetics. Thyroid function also plays a significant role.
Can I increase my BMR?
Yes. Building muscle through strength training is the most effective way — each pound of muscle burns about 6 calories per day at rest versus 2 for fat. Staying hydrated, getting adequate sleep, and eating enough protein also support a healthy metabolic rate.