How the calculation works
This calculator uses the Mifflin–St Jeor resting energy expenditure equation. For men: 10 × weight (kg) + 6.25 × height (cm) − 5 × age (years) + 5. For women: the same expression minus 161 instead of plus 5.
Worked example
For a 35-year-old woman who weighs 75 kg and is 170 cm tall, the estimate is approximately 1,477 kcal/day.
Understanding the result
BMR is not the same as the number of calories you need to maintain your weight. Walking, exercise, digestion, and ordinary activity all add to total daily expenditure.
Prediction equations give population-based estimates. Individual needs can differ due to body composition, health status, pregnancy, medication, and other factors.
Limitations
For adults only. A calculated BMR does not replace an individual evaluation or indirect calorimetry.