How this calculation works
Estimate basal metabolic rate using the Mifflin–St Jeor equation. The result is calculated locally in your browser from the visible inputs, and the method below remains available for checking.
Worked example
A 30-year-old man at 70 kg and 175 cm has estimated BMR around 1,649 kcal/day.
Assumptions and limits
- Inputs use the units shown beside each field.
- Intermediate values retain precision; displayed values are rounded for readability.
Questions people ask
How does the BMR Calculator work?
It applies this displayed method: Mifflin–St Jeor: 10w + 6.25h − 5a + 5 for men or −161 for women. Values stay in your browser and are not submitted to a server.
What should I check before using the BMR result?
Inputs use the units shown beside each field. Intermediate values retain precision; displayed values are rounded for readability. This is a general adult estimate, not a diagnosis or personalised medical advice. Seek a qualified clinician for health decisions.
Does this BMR calculator save my information?
No. Calculation inputs are processed on this device. Sharing creates a URL only when you choose the share action.