Basal Metabolic Rate Calculator
Calculate your basal metabolic rate — the calories your body burns at complete rest — using the Mifflin-St Jeor equation.
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- Works on all devices
Your result
1,618 kcal/day
Basal Metabolic Rate
AI explanation
Formula
Men: BMR = 10×weight + 6.25×height − 5×age + 5. Women: BMR = 10×weight + 6.25×height − 5×age − 161Worked example
Female, 60kg, 165cm, age 28
| Field | Value |
|---|---|
| Weight | 60 |
| Height | 165 |
| Age | 28 |
| Sex | female |
| Activity level | sedentary |
| Basal Metabolic Rate | 1330 |
Assumptions
- Uses the Mifflin-St Jeor equation. The activity level field is only used to also show TDEE for reference — it does not affect the BMR value itself.
- Informational only — not personalized medical or dietary advice.
Frequently asked questions
What does basal metabolic rate measure?
The calories your body burns at complete rest to maintain vital functions — breathing, circulation, cell repair — with no physical activity factored in.
Why does the calculator ask for activity level if it's about "rest"?
Activity level only affects the secondary TDEE figure shown alongside your BMR, for reference — it doesn't change the BMR calculation itself.
Can I increase my BMR?
Building lean muscle mass through strength training is the most reliable way to raise BMR over time, since muscle burns more calories at rest than fat tissue.
Related calculators
Sources
- A new predictive equation for resting energy expenditure in healthy individuals (Mifflin-St Jeor) — American Journal of Clinical Nutrition. Effective 01-02-1990, reviewed 13-09-2026.
This calculator provides a general estimate only and does not constitute personalized medical, nutritional, or fitness advice. Consult a qualified healthcare professional or registered dietitian before making significant changes to your diet.
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