BMR Calculator – Basal Metabolic Rate
Your Basal Metabolic Rate (BMR) is the estimated number of calories your body burns at complete rest — keeping your heart, brain, and cells functioning. The BMR calculator uses validated equations to estimate it.
Calculate your Basal Metabolic Rate
Enter your details and click “Calculate my BMR”. Optionally add body fat % to unlock the Katch-McArdle equation.
Enter your details and click “Calculate my BMR” to see your personalized numbers.
What is Basal Metabolic Rate?
BMR is the energy expended at rest to maintain vital functions. It is the foundation of TDEE: TDEE = BMR × activity factor.
Validated equations
| Equation | Best for |
|---|---|
| Mifflin-St Jeor | Most accurate overall; default. |
| Katch-McArdle | Uses lean body mass; needs body fat %. |
| Harris-Benedict (Revised) | Older validation set; still widely used. |
| Cunningham | 500 + 22 × lean mass; needs body fat %. |
Results are estimates only. Consult a healthcare professional for medical advice.