BMR & Calorie Baseline
Find the calorie baseline your body burns at rest.
BMR & Calorie Baseline
Mifflin-St Jeor: 10 x weight + 6.25 x height - 5 x age + 5 (male) or -161 (female)
Calculated instantly
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What This Calculator Does
The BMR Calculator estimates the calories your body burns at rest using the Mifflin-St Jeor equation, the most accurate standard formula for everyday use. It also applies common activity multipliers for maintenance planning.
How It Works
BMR uses weight in kilograms, height in centimeters, age, and sex: 10 x weight + 6.25 x height - 5 x age + 5 for men or -161 for women. Multiplying by activity factors (1.2 sedentary, 1.55 moderate) estimates daily maintenance calories.
Example
A 30-year-old, 70 kg, 175 cm male has a BMR near 1,649 kcal. With moderate activity, his maintenance need is about 2,556 kcal per day.
Formula
BMR = 10 × weight + 6.25 × height − 5 × age + 5Mifflin-St Jeor; subtract 161 instead of adding 5 for women.
TDEE = BMR × Activity Factor1.2 sedentary, 1.55 moderate, 1.725 active.
Reading the Results
Basal Metabolic Rate
Calories burned at complete rest, before any activity, per the Mifflin-St Jeor equation.
Sedentary / Moderate Needs
Daily maintenance calories when BMR is multiplied by a lifestyle activity factor.
Frequently Asked Questions
What is the difference between BMR and TDEE?
BMR is resting energy only. Total Daily Energy Expenditure (TDEE) adds activity and digestion, estimated by multiplying BMR by an activity factor.
How do I use BMR to lose weight?
Eat below your maintenance calories, roughly TDEE minus 300-500 kcal, while keeping protein high to preserve muscle.
Which formula does this use?
The Mifflin-St Jeor equation, which research consistently ranks among the most accurate for general populations.