How to use this tool
Enter adult age, height and weight, then choose the coefficient from the published equation.
Read the result as estimated resting energy expenditure. It is not a measured metabolic rate or an eating prescription.
Mifflin–St Jeor REE = 10×kg + 6.25×cm − 5×years + sex coefficient (+5 or −161)
Worked example
1,649 kcal/day · estimated resting energy
Fixed example using the settings below. Monetary examples use USD; dates and times use their stated reference values. This example stays unchanged when you edit your calculation.
Example inputs
- Adult age (years): 30
- Sex coefficient used by the published equation: Male coefficient
- Height (cm): 175
- Weight (kg): 70
Method illustration: A 30-year-old using the male coefficient at 70 kg and 175 cm has an estimate of 1,648.75 kcal/day.
Assumptions and limits
- For nonpregnant, nonlactating adults only. Not for children, acute illness, or an eating-disorder treatment plan.
- An equation estimates resting expenditure, not a measured metabolic rate. Body composition, hormones and activity affect actual needs. No weight-loss target is prescribed.
Method reference: Mifflin et al., 1990 original equation
Check or report a result
Check the units, selected calculation and assumptions first. Compare the fixed example above with your inputs to identify what changed.
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