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The energy your body uses at complete rest.
Enter age, height, weight and sex.
Mifflin-St Jeor: Men: 10w + 6.25h - 5a + 5 Women: 10w + 6.25h - 5a - 161
w is weight in kilograms, h is height in centimetres and a is age in years. Mifflin-St Jeor is generally the more accurate of the two for modern populations.
A 30-year-old woman, 165 cm and 62 kg.
Her BMR is about 1,340 calories a day before any activity is added.
BMR is what you burn at rest. TDEE multiplies it by an activity factor to estimate your full daily burn, which is what the calorie calculator reports.
Mifflin-St Jeor is the usual recommendation. Harris-Benedict is included because many older references and plans still use it.
Population formulas are typically within about 10% for most people, but body composition, medication and thyroid function all shift the real number.
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