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TOOLS · WEIGHT LOSS
Basal metabolic rate calculator.
The calories your body needs at complete rest — breathing, temperature, thinking.
Biological sex
years
18 years90 years
cm
120 cm220 cm
Your current weight, not your goal weight.
kg
35 kg250 kg
GOOD TO KNOW
Questions about this calculator, answered.
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Talk to a doctor about your case.
Calculators are a guide. A licensed doctor evaluates your full picture and decides whether a treatment is right for you.
MORE CALCULATORS
Keep exploring the numbers.
BMI calculator
Body Mass Index — the most common starting point, in kg and cm.
Open calculator →Total daily energy (TDEE)
Your BMR multiplied by a realistic activity factor.
Open calculator →Calorie deficit
How many calories to eat per day to lose weight without starving.
Open calculator →Daily protein
Recommended protein per day based on your goal and training.
Open calculator →Notice: Formulas are population estimates. Your actual metabolism can vary ±10–15% by genetics, hormones, or body composition. Clinical calorimetry measures more precisely.