How the calculation works
Mifflin–St Jeor estimates resting energy from weight, height, age, and the formula's sex constant. The selected activity factor then estimates total daily needs for maintaining current weight.
Calculator
Enter your details to estimate resting energy and approximate calories for weight maintenance.
The equation uses different constants for male and female adults.
For adults aged 19 and over.
Enter height in centimeters.
Enter weight in kilograms.
Choose the description that best reflects a typical week, not your most active day.
Little intentional exercise; most of the day is spent sitting.
Estimated result
This is an estimate, not a personal nutrition prescription. Individual needs can differ.
This is an estimate, not a personal nutrition prescription. Individual needs can differ.
Understanding the estimate
Mifflin–St Jeor estimates resting energy from weight, height, age, and the formula's sex constant. The selected activity factor then estimates total daily needs for maintaining current weight.
Choose the description that best reflects a typical week, not your most active day.
Metabolism, body composition, health, medication, temperature, sleep, daily movement, and measurement error can all change actual energy use.
Questions
No. It is an equation-based estimate for general information, not individualized medical or nutrition advice.
Equations cannot measure body composition, metabolism, health conditions, medication, sleep, or all daily activity.
Use the option that best represents an ordinary week. Do not choose a higher level based on one unusually active day.
No. It estimates approximate maintenance calories and does not prescribe a deficit or surplus.
Methodology
Resting energy uses the adult Mifflin–St Jeor equation. The maintenance estimate multiplies it by a conventional activity factor. Activity factors simplify real movement patterns and add uncertainty; the result is rounded for display only.
Mifflin et al., American Journal of Clinical Nutrition (1990)
Accuracy & trust
We test and review CoreBase tools, formulas, and information to keep them useful and accurate. Occasional inaccuracies or circumstances specific to your situation can still affect a result, so verify important decisions against your own requirements.
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