Health & Fitness
BMR Calculator - Basal Metabolic Rate
Calculate your basal metabolic rate (BMR) using the Mifflin-St Jeor formula.
Formulas and edge cases are reviewed against authoritative references before publication. For methodology, editorial standards, or corrections, use the links below.
Frequently asked questions
What is BMR?
BMR is the number of calories your body burns at rest in a day.
Is this the same as TDEE?
No. TDEE includes activity; BMR is the baseline without activity.
Which formula is used?
This calculator uses the Mifflin-St Jeor equation.
Related tools
About this tool
Inputs
- Weight
- Height
- Age
- Sex
Results
- BMR
Not everyone remembers the formula, and that is exactly why the BMR Calculator exists. It takes your raw figures and returns a meaningful answer. Individual variation means two people with identical numbers can have very different health profiles. Provide weight, height, age and sex to get started. The tool derives bmr from your entries. The ability to calculate your basal metabolic rate (bmr) using the mifflin-st jeor formula comes up more often than most people expect — in professional work, academic projects, and everyday planning.
BMR is the number of calories your body burns at rest in a day. Basal metabolic rate estimates use equations like Harris-Benedict or Mifflin-St Jeor, which factor in age, sex, height, and weight. Measure consistently — same time of day, same conditions — for the most reliable comparisons. Health metrics give you a snapshot of where you stand, but they are not a diagnosis. Use the result as a starting point for deeper analysis. Pair it with other tools for a more complete picture.