BMR Calculator
Calculate your Basal Metabolic Rate — calories burned at complete rest.
Input Values
kg
cm
Yrs
Results
Enter values to see results.
⚠️ Results are indicative only. Consult a qualified professional before making any decisions.
What is this Calculator?
The BMR (Basal Metabolic Rate) Calculator estimates the number of calories your body burns at complete rest — the minimum energy required to keep your vital organs functioning. Knowing your BMR helps you plan your calorie intake for weight management.
How to Use
1
Enter Weight, Height & Age: Enter your weight (kg), height (cm), and age.
2
Select Gender: Select Male or Female.
3
View Results: See your BMR, maintenance calories, weight loss target, and weight gain target.
Frequently Asked Questions
BMR (Basal Metabolic Rate) is the number of calories your body needs at complete rest to maintain basic functions — breathing, circulation, cell production, and temperature regulation. It accounts for 60–70% of daily calorie expenditure.
We use the Mifflin-St Jeor equation (1990), which is considered the most accurate for most people: Male BMR = 10W + 6.25H − 5A + 5. Female BMR = 10W + 6.25H − 5A − 161.
BMR is the calories burned at rest. TDEE (Total Daily Energy Expenditure) = BMR × Activity Factor — it includes calories burned through daily activities and exercise. TDEE is what you use for diet planning.
Yes. BMR decreases by approximately 1–2% per decade after age 20, primarily due to loss of muscle mass (sarcopenia). This is why maintaining muscle through strength training is important as you age.
Building muscle through strength training is the most effective way to raise BMR, as muscle tissue burns more calories at rest than fat tissue. Adequate sleep and eating enough protein also help.
Yes. Fever, illness, surgery, and hyperthyroidism raise BMR significantly. Hypothyroidism lowers BMR. During illness, caloric needs may be higher or lower depending on the condition.