BMR: What Your Body Burns at Complete Rest
Basal Metabolic Rate (BMR) is the energy your body uses just to stay alive — breathing, circulation, cell repair. It's typically 60–70% of your daily burn.
Understand the modern Mifflin-St Jeor equation and the factors that move your BMR.
The formula
Mifflin-St Jeor: men = 10·kg + 6.25·cm − 5·age + 5; women = 10·kg + 6.25·cm − 5·age − 161.
What changes BMR
More lean muscle raises BMR; aging and crash dieting lower it. Strength training is the most reliable way to keep metabolism high.
BMR vs TDEE
BMR is rest only. Multiply by your activity factor to get TDEE — your real daily target.
Related calculators
Frequently asked questions
Which BMR formula is best?
Mifflin-St Jeor is the current standard for most healthy adults.
Can I raise my BMR?
Building muscle through resistance training is the most sustainable way.
This tool provides educational information and is not intended to replace professional medical advice.