BMR & TDEE Calculator
Calculate your Basal Metabolic Rate (BMR) — the calories your body burns at rest — and your Total Daily Energy Expenditure (TDEE) based on activity level.
BMR / TDEE Calculator
Mifflin-St Jeor Formula
| Goal | Calories/day | Weekly Change |
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What Is BMR and TDEE?
BMR (Basal Metabolic Rate) is the number of calories your body needs to maintain basic functions — breathing, circulation, cell production — if you were completely at rest for 24 hours.
TDEE (Total Daily Energy Expenditure) is your BMR multiplied by an activity factor to account for the calories burned through movement and exercise.
BMR (male) = 10W + 6.25H − 5A + 5
BMR (female) = 10W + 6.25H − 5A − 161 · W=weight(kg), H=height(cm), A=age
This calculator uses the Mifflin-St Jeor equation (1990), which is considered the most accurate for most people. Other formulas include Harris-Benedict and Katch-McArdle.
Frequently Asked Questions
To lose approximately 1 pound per week, eat 500 calories below your TDEE. To lose 0.5 lbs/week, eat 250 below. Never eat below your BMR without medical supervision.
Different formulas give slightly different results. The Mifflin-St Jeor equation is the most widely validated for the general population. Activity levels are also estimates and may not perfectly match your actual activity.