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Calculators

BMR and the Mifflin–St Jeor equation.

What basal metabolic rate is, the Mifflin–St Jeor equation the page uses and why, worked through with an example, and who it was not made for.

By 2 min read

The BMI calculator: a BMI of 23.9 on a scale of the WHO's bands, with the healthy weights for the height beside it

Basal metabolic rate is the energy your body uses lying still for a day. It is most of what most people burn.

The formula.

Mifflin and colleagues measured 498 adults and published in 1990: 10 × weight in kg + 6.25 × height in cm − 5 × age in years, + 5 for men and − 161 for women. A man of 40, 180 cm and 80 kg: 800 + 1,125 − 200 + 5 = 1,730 kcal.

Who it was made from.

The people measured were 19 to 78 years old, so the page says so when the age is under 18: a growing child needs more.

From rest to a day.

The BMR door leads with energy at rest and says a day's energy beside it, the same number times your activity level.

Further reading

Topics: bmr calculator · basal metabolic rate · mifflin st jeor · resting metabolic rate · bmr formula

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