What This Calculator Estimates
This calculator estimates basal metabolic rate, which is a rough measure of resting calorie use. It is useful for planning, not diagnosis.
How to Use This Calculator
- Enter age, sex, height, and weight.
- Use current measurements for the most relevant estimate.
- Click Calculate BMR to view the result.
- Review the estimated resting calories per day.
- Use the estimate with other planning tools if needed.
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Frequently Asked Questions
What does BMR estimate?
BMR estimates how many calories your body may use at complete rest under standard conditions.
Is BMR the same as daily calorie needs?
No. BMR reflects resting needs only, while daily calorie needs usually depend on activity too.
Why do age, sex, height, and weight matter?
Those factors are used in common BMR formulas because they influence resting energy use estimates.
Can this replace professional nutrition advice?
No. It is a planning estimate only and not a substitute for personalized medical or nutrition guidance.
When should I recalculate BMR?
Recalculate when your body weight, body size, or activity planning changes meaningfully.
This calculator provides informational health estimates only and is not medical advice. Individual calorie needs can vary for many reasons.
Last updated: May 11, 2026