Man, 30, 80 kg, 180 cm, moderately active
BMR 1,780; × 1.55 = 2,759 kcal a day (11,544 kJ).
Calorie Calculator
Estimate how many calories you burn a day (TDEE) and your resting metabolic rate (BMR).
Result
Enter your values and select Calculate to see the result.
Runs in your browser — nothing you enter is sent to a server.
How the Calorie Calculator works
Enter your sex, age, weight and height, and choose your activity level. The calculator estimates your basal metabolic rate (BMR) — the energy your body uses at complete rest — with the Mifflin–St Jeor equation, then multiplies it by an activity factor to estimate your total daily energy expenditure (TDEE): the calories that keep your weight steady.
It's designed for healthy adults. Pregnancy, illness, athletes and older adults can need quite different amounts.
Formula
BMR = 10 × kg + 6.25 × cm − 5 × age + s
Where:
- s
- +5 for men, −161 for women
TDEE = BMR × activity factor: 1.2 sedentary, 1.375 light, 1.55 moderate, 1.725 very active, 1.9 extra active.
Examples
Woman, 45, 65 kg, 165 cm, lightly active
BMR 1,295; × 1.375 = 1,781 kcal a day.
Frequently asked questions
How accurate is this?
Mifflin–St Jeor is the most accurate of the common equations for adults, but individuals can differ by 10% or more. Treat the result as a starting point.
Which activity level should I choose?
Be conservative: most people overestimate their activity. If you're unsure between two levels, pick the lower one.
What's the difference between kcal and Calories?
None — food “Calories” are kilocalories. 1 kcal is 4.184 kJ; the Energy Converter converts other units.
Information:
Good to know
This is an estimate, not medical or dietary advice. Speak to a doctor or registered dietitian before changing your diet, especially if you have a health condition.
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