BMR Calculator

Basal metabolic rate (Mifflin-St Jeor / Katch-McArdle)

Your basal metabolic rate is the calories your body burns at complete rest — the floor of your daily energy needs. People search for it specifically when they want the resting number, separate from activity.

About you

Age (years)

Sex

Male Female

Mifflin-St Jeor uses sex-specific coefficients.

Measurements

Units

lb / ft+in kg / cm

Height (ft)

Height (in)

Weight (lb)

Optional

Body-fat %

Optional. Switches the formula to Katch-McArdle.

BMR

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Basal metabolic rate (Mifflin-St Jeor)

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How this is calculated

BMR — Mifflin-St Jeor (1990, default):

Men: BMR = 10·kg + 6.25·cm − 5·age + 5
Women: BMR = 10·kg + 6.25·cm − 5·age − 161

BMR — Katch-McArdle (when body-fat % is provided): BMR = 370 + 21.6 · LBM where LBM = weight × (1 − BF%/100).

Source: Mifflin MD et al., 1990. PMID 2305711.

How we choose and check our formulas