BMR Calculator
Estimate the calories your body burns at rest using the Mifflin-St Jeor formula.
How to use
- 1Enter weight, height, age and sex.
- 2See the maintenance calories.
About
Estimates the basal metabolic rate (resting calories), useful for diet and training planning.
How to calculate basal metabolic rate
UtilNexo's calculator estimates the basal metabolic rate (BMR), the number of calories your body burns at rest to maintain vital functions.
The calculation uses the Harris-Benedict equation, which considers weight, height, age, and sex. It is an estimate used as a starting point for planning diet and caloric expenditure.
From the basal rate, you can estimate total daily expenditure by multiplying by an activity factor. The tool shows the reference value and helps contextualize the result.
Examples
- 80, 180, 30, m → BMR 1858 kcal/day.
- 60, 165, 25, f → BMR 1411 kcal/day.
Limitations
- The result is an estimate; the real rate varies with body composition, genetics, and health conditions.
- This calculation is informational and does not replace guidance from a nutritionist or doctor.
How to use the basal metabolic rate calculator
- 1Enter weight, height, age, and sex.
- 2See the resting calorie estimate.
Frequently asked questions
What is basal metabolic rate?
It is the energy the body burns at rest to maintain functions like breathing, circulation, and temperature.
How do I estimate total daily expenditure?
Multiply the basal rate by an activity factor (sedentary, light, moderate, or intense).
Does the result replace a consultation?
No. Use it as a reference and consult a health professional for individualized goals.
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