This estimates the calories your body uses in a typical day, combining your resting metabolism with your activity level. It's a starting point for understanding your energy needs — not a prescription for what to eat.
Calorie Calculator
LiveHow this is calculated
BMR is calculated with the Mifflin-St Jeor equation (10 × weight in kg + 6.25 × height in cm − 5 × age, +5 for men or −161 for women), then scaled up by an activity multiplier ranging from 1.2 (sedentary) to 1.9 (extra active).
A 30-year-old man, 80 kg, 180 cm, with moderate activity (×1.55): BMR = 1,780, maintenance calories = 1,780 × 1.55 ≈ 2,759 calories/day.
Step-by-step guide
- Enter your sex, age, height, and weight.
- Choose the activity level that best matches your typical week — most people overestimate this, so pick honestly.
- Read your maintenance calories — the amount that tends to keep your weight roughly stable over time.
Common mistakes
Frequently asked questions
Is this the number of calories I should eat?
This is your estimated maintenance level — roughly what keeps your weight stable. Whether to eat more, less, or the same depends on your personal goals, and is worth discussing with a doctor or registered dietitian, especially for any significant or sustained calorie changes.
Why does my activity level matter so much?
For most people, activity accounts for a large share of total daily calories on top of BMR — the difference between sedentary and very active can be several hundred calories a day at the same body size.
How is this different from the TDEE Calculator?
They use the same underlying formula — TDEE (Total Daily Energy Expenditure) is simply the more technical name for the same maintenance calorie figure shown here.
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