Your metabolism, measured.
Find your basal metabolic rate — the calories your body burns at complete rest — using the Mifflin–St Jeor equation.
Calculate your BMR
BMR · Mifflin–St Jeor
1,649
kcal / day
Harris–Benedict (revised)
1,696kcal
For comparison — usually 5–10% higher than Mifflin.
At rest, per hour
69kcal/hr
Daily calories by activity
- Sedentary (little or no exercise)1,979 kcal
- Lightly active (1–3 days/week)2,267 kcal
- Moderately active (3–5 days/week)2,556 kcal
- Very active (6–7 days/week)2,844 kcal
- Extra active (hard exercise + physical job)3,133 kcal
Good to know
What is BMR?+
Basal Metabolic Rate is the number of calories your body uses at complete rest to keep essential functions running — breathing, circulation, and cell production.
Which formula does this calculator use?+
The Mifflin–St Jeor equation, which is currently considered the most accurate predictive BMR formula for the general population.
BMR vs TDEE — what's the difference?+
BMR is calories burned at rest. TDEE is BMR multiplied by an activity factor to account for movement and exercise. Use TDEE when planning a diet.
Why do men and women have different BMRs?+
Men typically have more lean body mass, which burns more calories at rest than fat tissue. The Mifflin–St Jeor formula includes a sex-based constant to reflect this.
