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BMR calculator
Calories your body burns at rest each day.
Quick answer
Enter your sex, age, weight and height. A 30-year-old man who weighs 70 kg and is 175 cm tall has a BMR of about 1,649 calories a day.
BMR (calories per day)
1,649
- Per hour
- 69
A general estimate, not medical advice. Talk to a doctor or dietitian about your own health.
How it works
Your basal metabolic rate is the energy your body needs just to stay alive: breathing, circulation, keeping warm.
This calculator uses the Mifflin-St Jeor equation, which is widely used for healthy adults.
Your real needs are higher because you move. The daily calories (TDEE) calculator adds activity.
The formula
- Men: BMR = 10 ร weight (kg) + 6.25 ร height (cm) โ 5 ร age + 5
- Women: BMR = 10 ร weight (kg) + 6.25 ร height (cm) โ 5 ร age โ 161
A worked example
Man, 30 years, 70 kg, 175 cm: 700 + 1,093.75 โ 150 + 5 = 1,648.75, about 1,649 calories a day.
Common questions
What is BMR?
Basal metabolic rate: the calories you would burn in a day lying still.
Is BMR the same as the calories I should eat?
No. You also burn calories moving about. Use the TDEE calculator for a daily target.
Why do men and women get different results?
On average men carry more muscle, which burns more energy at rest. The equation reflects that.
How accurate is it?
It is an estimate that can be off by a few hundred calories for any one person.