When to use this calculator
Estimate adult resting energy expenditure using the simplified Mifflin–St Jeor equation. An adult population estimate, commonly called BMR here; individual resting expenditure can differ. Not a calorie-intake prescription.
Explore the adult energy estimates calculators for other questions in this topic. For a related calculation, use the Calories Burned Calculator: Estimate gross activity energy expenditure using an entered MET value.
PUTTING IT INTO PRACTICE
BMR: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Weight (kg) | 70 |
| Height (cm) | 175 |
| Age (years, integer) | 30 |
| Equation sex coefficient | 1 |
| Result | 1,648.75 kcal/day |
- Check the input labels and enter the example values above.
- Apply the relationship: Estimated resting kcal/day = 10w + 6.25h − 5a + (male: 5; female: −161)..
- The result is 1,648.75 kcal/day, rounded for display.
How to interpret your result
An adult population estimate, commonly called BMR here; individual resting expenditure can differ. Not a calorie-intake prescription.
Population equations and MET values are estimates rather than personal measurements. Activity multipliers can introduce substantial uncertainty. Outputs describe expenditure models, not prescribed intake, weight targets or treatment.
Frequently asked questions
Is a BMR or TDEE estimate a calorie-intake prescription?
No. It is a modelled expenditure value. It does not account for every personal or clinical factor or prescribe what an individual should eat.
When is the bmr calculator useful?
Estimate adult resting energy expenditure using the simplified Mifflin–St Jeor equation. An adult population estimate, commonly called BMR here; individual resting expenditure can differ. Not a calorie-intake prescription.
How do I use the bmr calculator?
Enter weight (kg), height (cm), age (years, integer), equation sex coefficient. The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Estimated resting kcal/day = 10w + 6.25h − 5a + (male: 5; female: −161)..
What should I check before using the result?
An adult population estimate, commonly called BMR here; individual resting expenditure can differ. Not a calorie-intake prescription.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
Further reading
For background on this topic, see Mifflin et al.: original resting energy equation ↗. This is a topic reference, not an external review or endorsement of this tool.
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